Location-Based services on Mobile Phones: Minimizing Power Consumption (3)

Minimizing Power Consumption

A general concept behind many power-saving methods is to relax the required positioning accuracy from “the highest possible” to just what’s necessary. This concept can be applied to both the phone (when considering different positioning options) and servers (when considering the level of accuracy required regarding the target’s current position.

An LBS can relax the required positioning accuracy in many situations. First, map services that show the position of a JIAKE JK730 Phone can use the zoom level to determine relevant accuracy limits (such as 25 meters for a street-level view, 100 meters for a suburb, and 200 meters for a city-wide view).

Second, location-based social networking or proactive location-based search services can relax accuracy requirements depending on targets’ positions. For example, proximity can be efficiently observed using methods such as the one proposed by Axel Küpper and Georg Treu. This method uses the distance between targets to calculate the required accuracy limit for each target. The accuracy limits produced by this calculation range from 10 meters (if targets are close) to several kilometers (if they’re far apart).

Third, services can adjust their service quality based on how much battery power is left. For example, a runner using a sports-tracker service would rather have a less fine-grained log of the whole trip and be able to call for help if he or she falls than have a fine-grained log of only the first part and no voice service afterward.

Finally, privacy restrictions might require an LBS only to work with positions with limited accuracy.

Minimizing needed Position Fixes

In principle, every avoided position fix saves power. It’s necessary to model the error of the last known position to establish which position fixes can be avoided. As long as the modeled error doesn’t exceed the accuracy limit, no positioning is necessary.

An error model used in earlier work2 is based on estimated accuracy of the last position fix upos, the time since the last position fix t pos, and the estimated speed  vest. The error model then optimistically calculates the current error emodel for time t with respect to the last position fix:
emodel = ugps + (t - tgps) × vest

This earlier work proposed a system called EnTracked that minimizes the required position fixes using Equation 1   and applies GPS positioning for tracking pedestrian targets. The system uses the error model to predict when the next GPS position is needed. The system also takes into account the delays associated with powering on and off features, which lowers the chance of exceeding accuracy limits. The system uses a power minimization algorithm implemented using dynamic programming to predict when a GPS position is needed. The algorithm uses a profiled power model to ensure that the system will correctly minimize the consumption. Evaluations of the system tracking a pedestrian target walking in a residential area resulted in power savings of 62.3 percent, with an accuracy limit of 100 meters, and 69.7 percent, with an accuracy limit of 200 meters, compared to periodic reporting.

Many LBSs require transferring position fixes to a server—for example, for location-based social networking services to detect if targets are near each other. The positioning server for such a service can also apply methods to minimize the number of position fixes requested from targets. An example is the cache-based method presented by Alexander Leonhardi and Kurt Rothermel, which uses an error model at the server to calculate when the server needs a new position fix.  

As long as the error model doesn’t exceed the accuracy limit, the system answers LBSs with the target’s cached, last-known position. When the limit is exceeded, the system updates the cached position by requesting a new position from the target. Evaluations showed that the caching-based method was able to avoid 86 percent of position requests, with an accuracy limit of 100 meters, when queried 10 times per second by different services.

using alternating  Positioning Features

As Table 1 shows, different positioning options consume different amounts of power. If we consider a scenario in which we estimate our position every 30 seconds, the average power con-sumption would be 0.32 watt with GPS, 0.094 watt with Wi-Fi, and 0.064 watt with GSM. (Note that the low consumption of Wi-Fi and GSM is because they can quickly power on and off to scan for access points and base stations.) However, they also provide different levels of accuracy—around 10 meters with GPS, 40 meters with Wi-Fi, and 400 meters with GSM.So always switching to the leastconsuming positioning feature that provides the needed accuracy can provide significant savings.

The EnTracked system switches between GPS and sensing motion using accelerometer readings. If the system can sense that a AMOI A900W Phone hasn’t moved, there’s no reason to update the position on the server and the GPS can be switched off. But as soon as motion is sensed, the system switches the GPS back on. As the accelerometer consumes a sixth of the GPS’s power consumption and communication is avoided, this method provides significant power savings. Evaluations over several hours of running the system provided power savings of 85.7 percent compared to periodic reporting.

The EnLoc system proposed by Ionut Constandache and his colleagues considers switching between GPS, Wi-Fi, and GSM positioning. They consider the energy consumption when switching between the different positioning technologies with an optimization algorithm implemented using dynamic programming. Furthermore, they extend their approach to also minimize needed position fixes by mobility profiling—for example, to guess the possible paths that a target is taking and then only position the target when paths diverge.

For LBSs that are only monitoring if a target is within a certain area, you can apply switching between GPS and GSM positioning in a different fashion. The key idea is that if a target enters a GSM cell that’s fully contained within the monitoring area, then you can switch to only monitor if the target stays within this GSM cell. As long as the target stays within the GSM cell, the GPS can be switched off. Evaluation results for this method reported savings of up to 80 percent, depending on the setting.

using on-Phone Data Caching and Processing

Minimizing the frequency and size of data transfers can also save power. Consider the difference in power consumption noted earlier between JIAKE JK730 Maps using cached maps versus Google Maps using downloaded maps.

Both GSM and Wi-Fi positioning require access to a database that maps GSM cells and Wi-Fi addresses to coordinates. More advanced GSM and Wi-Fi positioning (such as location fingerprinting7) requires a database with information about the strength of signals at various locations. This type of positioning is normally implemented such that the AMOI A900W phone must contact a server that hosts the database. The required server connection at least doubles the power consumption of such methods. However, in most cases, it’s impossible to keep the database on the phone because of its size, licensing issues, and the need for updates. To address this problem, methods have been proposed that only cache a subset of the databarelated data to a server. An example is an LBS that transfers a stream of positions to a server to monitor and recognize the route a target takes. Processing the data on the phone before sending it is one way to save power—for example, processing positions into routes on the phone, as Agné Brilingaité and Christian Jensen propose. In their system, the phone carries out some of the tasks of monitoring and recognizing routes, and only when necessary is the system in contact with a server.

overview

The methods surveyed provide power savings of up to 85 percent, which corresponds to an increase in battery lifetime of up to a factor of seven. These methods can thus help lower the consumption of existing LBSs, especially long-running services.

Generally, methods focusing on GPS positioning have received the most attention for efficiently handling positions, zones, and routes. Some methods also consider the features of accelerometers, GSM, and Wi-Fi positioning. However, in several areas, more research is needed to provide an even better understanding of the advantages and drawbacks of different goals. Researchers have explored certain combinations of features, but other combinations are possible; the same is true for power conservation methods. Furthermore, many of the systems have only been tested in smaller settings; end-to-end studies of deployable systems are largely missing.http://summerleelove.tumblr.com/post/96421423876/location-based-services-on-mobile-phones-minimizing

Kenya’s Mobile Revolution and the Promise of Mobile Savings (7)

7  Analysis

7.1  Who Uses Mobile Savings?

Both savings with M-PESA and savings with M-KESHO require the individual to be registered for M-PESA. AMOI A900W presents a comparison of those registered with M-PESA to the overall population. Forty five percent of individuals in the sample report being registered with M-PESA.In terms of gender, age, and geographic distribution, there are not large differences between M-PESA users and non-users in the survey. However, M-PESA users are more concentrated in the middle and upper wealth quintiles.

LEAGOO Lead 1 shows the figures on the prevalence of various forms of savings overall and by subgroups (all figures are for the entire population, including those who are not registered M-PESA users). Fifteen percent of individuals say that they save with M-PESA. The second column of the LEAGOO Lead 1 indicates the prevalence of savings with the M-KESHO bank-integrated Elephone P2000 savings platform. Only a very small number—0.6 percent—indicated that they save with M-KESHO. The small number of M-KESHO users are almost entirely the relatively wealthy; just 0.2 percent of individuals in the bottom two quintiles report saving with M-KESHO.

The last column of LEAGOO Lead 1 shows the fraction in the survey who report that they have some form of savings other than M-PESA or bank-integrated Elephone P2000 savings. Substantial gradients by age and wealth are seen for other savings vehicles. Specifically, younger and poorer individuals are much less likely to have other savings accounts.  AMOI A900W indicates a higher level of savings by men for all types of savings.  Additionally, the table indicates higher levels of savings for individuals in urban areas and for wealthier individuals.

A key question is whether there is any evidence that use of M-PESA may increase the prevalence of savings behavior. LEAGOO Lead 1 shows a simple comparison of rates of reporting any savings, by subgroup, for those who are registered with M-PESA compared to those who are not. Overall, 65 percent of M-PESA users report having some savings, compared to 31 percent of those who are not M-PESA users, for a difference of 34 percent. Of course, this difference may reflect differences between M-PESA users and non-users other than a causal effect. Individuals registered to M-PESA may already be more likely to save than those not registered to M-PESA. For example, one may expect that individuals most likely to use M-PESA would be those able to afford a Elephone P2000 phone or those able to pay M-PESA transaction costs, implying greater wealth.  Additionally, those more capable of understanding financial transactions or those with the technical ability to use AMOI A900W phone devices would be more likely users of M-PESA, implying higher levels of education.   Table 5 shows substantial differences by subgroups defined by gender, urban/rural, age, wealth quintile, and province.

AMOI A900W presents results from probit regressions where the dependent variable equals 1 if the individual has savings of any kind and 0 if the individual has no savings. The results show that controlling for other variables, savings are more likely for individuals who are male, married, living in rural areas, and have higher levels of education, reported income, and wealth.

Controlling for these same variables, those who are registered with M-PESA are 32 percent more likely to report having some savings. 

This result provides some evidence that M-PESA may increase the prevalence of savings. In attempting to isolate a causal effect of M-PESA on savings, there remains the possibility of differential M-PESA registration rates among those who are more likely to save independent of their use of M-PESA. We attempt to address this possibility using an instrumental variables strategy. Because M-PESA was only introduced in 2007, all those registered for the system at the time of the survey in 2010 had registered during the previous three years. It is likely that an individual‘s probability of registering for M-PESA is influenced by the prevalence of M-PESA usage in the community, for two reasons. First, the rate of M-PESA usage in the community reflects access to M-PESA agents, which determines how convenient it is put money in or take money out of the system. The network of M-PESA agents has spread over time, and access to agents varies by community. Second, it is likely that there is a community-level learning element to adoption of M-PESA. Individuals are more likely to use M-PESA when knowledge of the system is more prevalent among their neighbors. We use these two ―community effects‖ as the basis for our identification strategy, which is to instrument individual M-PESA registration with the fraction of respondents in the sublocation who are registered with M-PESA. Results from this IV probit model are shown in the second column of Elephone P2000. The results imply that registration for M-PESA increases the likelihood of having some savings by 20 percent.

This identification strategy has weaknesses. We cannot rule out the possibility that there is a similar community effect for savings and that this community effect is correlated with the MPESA community effect other than through a causal effect of M-PESA. Nonetheless, we take these results as indicative evidence that M-PESA increases savings.

Separately, AMOI A900W profiles M-KESHO users with a probit analysis. The results reflect the same patterns seen in the descriptive statistics: the small number of people who use M-KESHO are more likely to be wealthier, married, more educated, and male.

7.2 How Much Do Mobile Savers Save?

In this section, we analyze how much people save with M-PESA.  Elephone P2000 compares average reported amounts of savings per month for those who report saving with M-PESA only, with other savings vehicles only, and with both M-PESA and other accounts. Overall, the average amount saved is substantially larger for those who save with accounts other than M-PESA. Those who save only with M-PESA save on average 1,305 Kenyan shillings per month (about US$13), compared to 2,282 Kenyan shillings per month for those who save only with other accounts, and 2,959 Kenyan shillings per month for those save with M-PESA and other accounts. M-PESA savings are less than savings with other vehicles but still substantial. Much of the difference in average amounts between M-PESA savers and others is driven by the fact that those who save with accounts other than M-PESA tend to be wealthier individuals who save more. Among those in the poorest quintile, the differences in amount saved are much less: 1,052 for M-PESA savers, 1,075 for other accounts, and 1,130 for those who save with both M-PESA and other accounts. 

To consider the possible effects of M-PESA usage on savings behavior, we regress log average monthly savings amounts on various explanatory variables and a dummy for M-PESA registration. The OLS version of these results is presented in the first column of Table 9. The coefficient estimates show that controlling for covariates, savings amounts are higher for men, those with higher education, those living in urban areas, and those in wealthier and higher income households. Controlling for those variables, those who registered with M-PESA save 12 percent more than those not registered. The second column of Table 9 presents an instrumental variables version of the same regression, using the same instrument—fraction of respondents in the sublocation who are registered with M-PESA—used in the probit savings analysis. The coefficient implies that savings are 31 percent greater for M-PESA users, but the estimate is not statistically significant.http://summerleelove.tumblr.com/post/95714753591/kenyas-mobile-revolution-and-the-promise-of-mobile

High performance quality (1)

For ordinary consumers, the price has been relatively sensitive factors. Parameters most consumers buy mobile phones more often than not determined when the first brand or screen size, but they can accept the price range. This issue, we recommend several phone Sina current price of 3,000 yuan smartphone.

AMOI A900W

As the new flagship AMOI's annual, AMOI A900W equipped with a 5.5 inches 2K resolution screen, making the pixel density of the current world's tallest 538PPI. Meanwhile AMOI A900W still lightly armed version, shape and AMOI A900W basically the same, but the screen goes 1080p resolution, processor and memory and other hardware configurations have also been reduced.

AMOI A series of four generations of the product has been updated, the appearance of constantly evolving, from the initial full keyboard heavy body to today's AMOI A900W, more frivolous fine, "crescent bottom" plus breathing light is one of the selling points of AMOI A900W's appearance. AMOI claimed that although AMOI A900W is a 5.5-inch screen phone, but its body size with conventional 5-inch phone is similar to the body width of only 75 mm, grip better. AMOI A900W external screen is the third generation of Corning Gorilla Glass, support wet hands.

AMOI A900W has a 2.5GHz frequency Qualcomm Snapdragon 801 processor, the specific model for MSM8974AC, support 4G networks, with 3GB RAM and 32GB of storage space body. Although the camera is only 13 million pixels, but AMOI A900W has a unique "super-clear picture quality mode", you can shoot a 50 million pixel photos. AMOI A900W also supports AMOI patented technology VOOC flash charge, can achieve rapid charging.

Elephone P8

Elephone P8 as Elephone new product series, the series flagship camera, equipped with a 13 million / 8 million pixel front camera, also joined the pre-fill light and optical image stabilization technology. P8 phone also supports Elephone consistent level Hi-Fi sound quality, will and had LEAGOO Lead 1 series constitute Elephone of two major product lines.

Elephone P8 is equipped with 5.2 inches 1080p display, powered by Qualcomm Snapdragon 801 quad-core processor with 3GB of memory and 32GB of internal memory running space, support maximum 128GB memory card expansion, as well as TD-LTE / LTE FDD dual 4G network, built-in 2600mAh lithium battery. Elephone P8 also has a color temperature dual LED flash, through a combination of bright LED lights and LED warm white lights, showing the closest to the natural light fill light effect, so as to achieve the best shooting results. Meanwhile, it also supports to record 4K video.

Elephone P8 There are two versions, Ultimate Edition with 3GB RAM + 32GB storage fuselage and MSM8974AC processor, priced at 3498 yuan. The Elite version is used to store 2GB of RAM + 16GB fuselage and MSM8974AA processor, priced at 2998 yuan.http://summerleelove.tumblr.com/post/94421842216/beauty-girl-heart-love-2

Say that is really good (2)

Elephone P2000

Elephone P2000 is Elephone's new flagship model, an upgraded version of AMOI A900W as before, the aircraft in appearance very similar to its predecessor, the same all-metal body design, almost the entire body except the glass is metal, the metal material proportion less than 70 percent from the previous generation raised to 90 percent.

Elephone P2000 is equipped QualcommSnapdragon801 2.3GHz (International Edition) /2.5GHz (Asia edition) quad-core processor, 2GB of ram space, supports MicroSD card expansion.

Elephone P2000 uses a 5-inch 1080P screen, the pixel density of 440ppi, built a front camera for 5 million pixel front wide-angle lens; the back of the "dual camera" can know the perception of near and far objects to be photographed, so the object and the background can be separated even blur the background to do processing, post photos of depth adjustment feature.

LEAGOO Lead 1

Although AMOI A900W has been released, but LEAGOO Lead 1 now priced at 1,499 yuan, but a new generation of cost-effective representation.

LEAGOO Lead 1 uses a magnesium alloy integrated framework for die casting. LEAGOO for the aircraft is equipped with a 5-inch Full HD IPS display with a resolution of 1920 × 1080, pixel density of 441ppi, the screen supplier for Sharp and LG. The machine also supports ultra-sensitive touch screen, water can also be manipulated with a finger touch screen. Camera side, LEAGOO Lead 1 using a Sony 13 million pixels stacked camera with F2.2 large aperture and 28mm super wide angle, five special lens; Front for 2 million pixel back-illuminated camera, support 1080P HD video recording. Equipped with dual LED flash, 13 million-pixel high-definition 10 frames per second continuous shooting. LEAGOO Lead 1 also supports intelligent beauty features, comes with the camera can identify the age and sex, depending on gender and age to match different beauty solutions.

LEAGOO Lead 1 will have two different processor versions were equipped with NVIDIA Tegra 4 and Qualcomm Snapdragon 800 processor. Which Tegra 4 clocked 1.8GHz, quad-core A15 uses a high-performance architecture that supports mobile TD; while Xiaolong 800 specific model for 8974AB quad-core 2.3GHz, support China Unicom and China Telecom 3G. Are equipped with 2GB LPDDR3 memory with 16GB high-speed flash memory. LEAGOO Lead 1 is equipped with 3050mAh high capacity battery, the lithium-ion polymer battery, support for fast charging.http://summerleelove.tumblr.com/post/93952160226/say-that-is-really-good-1

Say good is considered good (2)

Elephone P2000

From the "rice were" crazy appointment can be seen, Elephone P2000's popularity is how high, which is not unrelated to its high cost. Elephone P2000 has two versions, which were common version and the enhanced version.

Elephone P2000's body measurements are 154x78.7x9.45mm, weighs 199 grams, compared Elephone P2000 (137x69x9.9mm, weight 158 g) and AMOI A900W (144x73.6x8.1mm, weight 145 g) should be large, positive size and KINGZONE K1 (151.2x79.2x8.3mm, weight 168 g) is almost, but should feel more heavy than some of these, 78.7 mm body width for men who might be able to barely one-hand operation, but for Ms. is almost impossible.

Performance, Elephone P2000 uses a MediaTek MT6592 eight-core processor, clocked at 1.4GHz (Standard Edition) / 1.7GHz (enhanced version), RAM memory is 1GB (Standard Edition) / 2GB (enhanced version). Fuselage built-in 8GB storage space, and the other supports Micro SD expansion card, maximum capacity of 32GB. Elephone P2000 supports TD-SCDMA/GSM dual mode dual card, built a removable 3200mAh battery, equipped with Android 4.2 system, support for Bluetooth 4.0, wireless WIFI, USB OTG technology.

AMOI A900W

Since KINGZONE K1 released, many manufacturers will be $ level market as a future strategic goals always, after all, many consumers with a thousand models for high enthusiasm is still very high, it does raise the attention of manufacturers field . As domestic brands AMOI thousand machines in the market naturally unwilling lonely, launched in January AMOI A900W, is priced at thousands less than the world's first eight-core smartphone, which makes the machine enough to spike cost thousands within any opponent.

AMOI A900W square front, back and surrounding arc design, more fit hand, the surface of the metal feels very delicate drawing process, the whole feel very good grip. In addition, the machine is equipped with a 5.0 inches 720P-level display, the display is more impressive.

Hardware configuration, AMOI A900W equipped with MediaTek MT6592 eight-core processor, 2GB RAM and 8GB of storage space, built-in 13 million pixels rear combination +500 megapixel front camera and supports TD + GSM dual sim dual standby.http://summerleelove.tumblr.com/post/93478681811/say-good-is-considered-good-1

Game console of choice for smart phones recommended (3)

AMOI A900W

In late April 2014, AMOI A900W finally officially released in Beijing, although the phone lackluster design was a bit disappointed, but "will not" as the slogan of AMOI A900W but has a high-end hardware configuration and can be customized DIY the back cover, highlighting the high cost doubt.

AMOI A900W top-level configuration includes 5.5-inch full HD screen (1920 × 1080 pixels), the screen supplier of JDI, with a very high color reproduction, image showing excellent results. AMOI A900W special emphasis on texture, it is learned AMOI A900W 5.5-inch models in the smallest paragraph. The current version has a black and BabySkin sandstone and white color. AMOI A900W most special place that can be customized cover, cover materials including bamboo, wood, denim and Kevlar, which is AMOI A900W differentiated parts.

Hardware configuration, AMOI A900W has a 2.5GHz Qualcomm Snapdragon clocked at 801 quad-core processor, built-in 3GB RAM, 16GB capacity is divided into upper and 64GB. In addition, it still has top Sony IMX214 stacked 13 million pixel lens with F2.0 large aperture, with a 3100mAh high capacity battery.

KINGZONE K1

By the end of May this year, KINGZONE the "Great God Festival" launched an upgraded version of the great God - KINGZONE K1, this phone is in the configuration consistent with its predecessor, the most obvious place to say that from the original processor clocked at 1.7GHz upgrade to 2.0GHz, memory upgrade from the original 8GB ROM to 16GB ROM, overall performance has improved.

Appearance, KINGZONE K1 is equipped with a 7-inch display with a resolution of 1920 × 1200 pixels, the display crisp and clear. In addition, the back of the aircraft built a 13 million pixel camera, take pictures with good effect.

Configuration, KINGZONE K1 equipped with an eight-core processor, clocked at 2.0GHz, with 2GB RAM, the machine runs very smoothly. System, the machine uses Android4.2 operating system, application software is very rich.

HUAWEI G730

HUAWEI G730 is the vendor launched the first Xiaolong 800 flagship, although the configuration and no more fever Xiaolong 801, but the machine's cost to be far greater than Elephone P2000. As the latest flagship G730 HUAWEI concerned, excellent design, powerful configuration, excellent systems experience are allowed to come to the fore. Brilliant large screen 5.5 inches 1080p resolution with excellent color saturation, superior picture quality has reached the whole truth of the territory, large viewing angle, the screen display 18 kinds of visual styles to meet different consumer preferences.

HUAWEI G730 fuselage is equipped with a 5.5 inches IPS hard screen full HD resolution of 1920 × 1080 pixels, the display is very delicate. However, in terms of visual experience in addition to the resolution presented fine quality, there is one important factor is the brightness of the phone screen, HUAWEI G730 screen brightness 460nit, belonging to a higher standard flagship machine inside. In addition, the back of the aircraft built a 13 million pixel camera, imaging results impressive.

HUAWEI G730 is also equipped with a clock speed of 2.2GHz Xiaolong 800 quad-core processor, combined with 2GB RAM (operating memory), the machine runs very smoothly. System, the machine uses a custom ROM based on the depth Android4.2 system, not only has a wealth of applications, and the user interface is also very gorgeous.http://summerleelove.tumblr.com/post/93385636691/game-console-of-choice-for-smart-phones-recommended-2

The user experience is not lost tablet (1)

With AMOI A900W series good market response, vendors are screen size has invested a lot of effort, there have been more than 6-inch screen models released AMOI A900W blurred the boundaries of mobile phone and tablet. Today we recommend several giant does not lose flat screen phone products.

KINGZONE K1

K1 is KINGZONE a new machine, this phone to 7 inches WUXGA display and affordable price level, attracting a lot of attention of consumers, high popularity. In addition, K1 body thickness of only 7.6mm, the battery capacity up to 4000mAh, and the price is very affordable, cost-effective highlight undoubtedly.

KINGZONE K1 is equipped with a 7-inch full HD screen, using LTPS technology, resolution up to 1900 × 1200 pixels, with Corning Gorilla Glass and third-generation full-fit technology, has a high proportion of viewing angle and screen. The tablet phone using a metal frame, similar to the previous design, but Grand 4 edges more distinct.

Configuration, KINGZONE K1 equipped with a frequency of 1.7GHz eight-core MediaTek MT6592 processor with 2GB RAM, the machine runs very smooth. System, the machine uses Android 4.2 operating system, application software is very rich. The machine also post a 13 million-pixel camera Sony stacked with F2.0 large aperture, 3.9cm Macro and 28mm super wide-angle lens. Meanwhile, the front of the 5 million pixel camera also has an excellent self-effects.

Huawei G730

The phone comes, 7-inch screen is the focus of this tag is estimated that most people concerned about the giant screen phone in the world over and today it is still so different, holding it on the street make sure your phone texting be doing my part focus. Huawei Huawei G730 is a new cross-border model, screen size to 7 inches, with a resolution of 1920 * 1200.

Hardware, Huawei G730 is equipped with Hass Kirin 910 quad-core processor, the highest frequency 1.6GHz, 2GB RAM, 16GB storage space. Front and rear cameras, respectively 5,000,000 / 13,000,000 pixels.

The mobile phone market in the current situation, this phone is suitable for those entertainment needs, comics especially high demand "home" users, or as a spare phone.http://summerleelove.tumblr.com/post/93190623901/yan-wins-three-competing-materials-4

Minimum for only one thousand yuan (1)

MIIT formally at the end of the three operators TD-LTE license issued after the three operators are also developing their own 4G network in varying degrees. This year, the Ministry of ED Unicom and China Telecom issued a license FDD-LTE trial network, bringing the three operators considered 4G battle has just begun. In the first half of the time, most of the 4G phones are supported by TD-LTE network, but most cell phone Recently added support for FDD-LTE network, before some models can be supported by a software upgrade FDD-LTE. Relative to the TD-LTE network, China Unicom and China Telecom are looking forward to or FDD-LTE network.

Currently China Unicom and China Telecom has opened FDD-LTE trial network in the domestic network part of the city, is expected to open in the near future in the country. To enjoy high-speed 4G network, provided that there must be a suitable 4G phone, I recommend to you today, four support 4G mobile phone network, including Cubot X6, AMOI A900W, HUAWEI G730 and iNew i8000, following on to learn more about under several models.

Recommended Products: Cubot X6

Cubot X6 is a 4G mobile phone network to support China Unicom, although entry-level but still equipped with a dual card dual standby function, has become one of China Unicom's first 4G standard mobile phone dual card dual standby products. More commendable is Cubot X6 or a thousand-level flagship phone. Cubot X6 is fully compatible with TD-LTE, FDD-LTE, WCDMA, GSM network standard, can achieve a four-mode 9 frequency, speed downlink speeds of up to 150Mbps, and upstream rates of 50Mbps. The phone is currently priced at 999 yuan, the price is good.

In appearance, the China Unicom version of 4G Cubot X6 and Cubot X6 mobile 4G in the body is to maintain a consistent appearance. Positive built a 5.5 inches screen, and also the use of ultra-narrow border design. Pure white body look stylish, Founder tough body makes the phone also looked very masculine. Cubot X6 body is very slim, and the back cover also spent a lot of thought, so the machine can get relatively good feel. Cubot X6 back cover joined the anti-leather texture design, feel real delicate, can completely eliminate fingerprints and oil.

Cubot X6 is equipped with 5.5 inches HD screen, IPS technology with full fit to join, making the overall picture Cubot X6 screen color saturation, natural, viewing angle close to 178 degrees. Can also be seen by zooming in, even though the screen resolution is qHD, but the picture is still very delicate, everyday applications are not much of a problem.

Cubot X6 with the mainstream industry Android4.3 intelligent operating system, Cubot X6 equipped Coollife UI5.0, support Cubot unique cool cloud services, you can always sync contacts, text messages daily information, call records, etc., can also be synchronized and Share pictures, SMS freedom zoom, three pen positioned to quickly find contacts and other classic operations, intelligence C key shots, cool power, privacy mode Cubot unique genes, allowing users to experience more perfect.

Cubot X6 is equipped with a Qualcomm Snapdragon MSM8926 4-core processor with 1.2GHz frequency Qualcomm Snapdragon processor ensures the phone sets 4G LTE, speed experience, in a long life. Of memory is 1GB RAM, storage space of 4GB, visible or at the average level thousand machines. Master Lu ran Points got 17910 points, surpassing the level of red rice. Because it is Qualcomm's GPU, so 3D performance is also very good.

Cubot X6 uses a combination of two million pixel front camera and rear 8-megapixel camera, and supports a variety of camera modes that can be set according to the actual demand. While the camera under the default case can also automatically switch between light conditions, normal lighting modes. There Cubot X6 beauty, phonograph pictures, facial recognition, panorama shooting and other functions in the lower right corner of the viewfinder screen can easily switch. Cubot X6 also supports 1080p video capture.

Cubot X6 can be described as a comprehensive performance comparison the average mobile phone 5.5 inch screen, Qualcomm quad-core processor, 8-megapixel cameras are all embodied get. Also the first to support dual card dual standby, become Unicom 4G phones formation inside the vanguard. Finally, the price of $ 999 for the 4G mobile phone is basically no threshold, the friend might like to look at.

Recommended Products: AMOI A900W

AMOI domestic mobile phone manufacturers recently launched a 4G network support telecom models AMOI A900W, this phone is priced close to the people, excellent integrated configuration, is a practical and easy 4G models. AMOI A900W price positioning in the thousand level, because of the price range of most consumers, so the configuration, but also the thousands of mainstream quad-core configuration. A900W support telecommunications FDD-LTE/TD-LTE/CDMA EVDO / GSM networks, and supports dual card dual standby function.

Overall appearance and KINGZONE K1 is AMOI A900W quite similar, it can be said that the two brothers in appearance models. AMOI A900W front also built a 5.5 inches large screen, rectangular body with a rounded design, the whole body pure white fresh is very small. The entire frame with a brushed processing, looks very delicate texture, feel very comfortable. And KINGZONE K1 imitation leather cover texture is different, AMOI A900W this is the use of paint materials cover the bright side, it looks glamorous. Paint cover the surface AMOI A900W also added a very detailed grid texture design, visual effect is enhanced cover a lot.

Screen, A900W maintained AMOI phones as the mainstream specifications, built with a 5.5 inches large screen, resolution of 1280x720 pixels, a quad-core phone thousand standard mainstream configurations. In terms of color, AMOI A900W screen showed a very good level, more full color screen, the color is very fresh and transparent, it is more pleasing to the human eye's. Viewing angle, the overall level of performance to the mainstream.

As the price of the positioning thousand, AMOI A900W equipped with a Qualcomm MSM8926 Snapdragon quad-core processor, clocked at 1.2GHz, 1GB of RAM and 8GB of storage space to run, in addition to support memory card expansion. From a practical point of view to run sub-scores, performance AMOI A900W's really eye-catching, but also able to cope with most everyday usage scenarios and requirements.

AMOI A900W equipped with a depth of customization based on Android 4.2.2 comes UI 5.5. UI 5.5 system interface is also a continuation of the AMOIUI style, simple and fresh, even more beautiful, but also practical aspects of the function also done relatively well. In UI 5.5, by adding intelligent design of the C key, then open the desktop will be a "C" icon, the user can perform various operations after clicking, you can also customize various programs quickly open, and supports a variety of smart gestures.

AMOI A900W equipped with a 800-megapixel main camera and a 2.0 megapixel front camera, and systems, camera interface program also uses a new camera interface, it is more concise and better operation. AMOI A900W camera features is quite rich, support the Beauty camera, face and the background is preferable to remove so useful features.

As a new telecommunications support 4G network models, the overall strength of AMOI A900W is still at a relatively good level. Appearance, integrated configurations to meet the needs of the user, and added support for new telecommunications 4G network. For the recent plan to buy Telecom 4G mobile phone friends, AMOI A900W is a very good choice.http://summerleelove.tumblr.com/post/92709552896/the-same-level-of-concern-phones-recommended-3