LG G Flex2 side1A new trend has started in the last couple of years, in which the top manufacturers of mobile technology want to spice things up a bit by introducing unconventional types of designs for smartphones. The ordinary, or in other words, standard design is OK, it works, there isn’t a necessity for a change, but who doesn’t like to have alternative option that look and feels different, while having some unique features to get advantage of? Different companies look for this change in different ways. For example, Samsung introduced the curved edge display in the Galaxy Note 4 Edge, that later on got improved in the Samsung Galaxy S6 edge, which had both sides curved, in addition to other goodies. LG on the other hand, had a different idea of an alternative design. Even though the goal is the same – achieving a smartphone design that is more functional and comfortable LG’s vision of functionality is bending the top and bottom of the device. This innovation was introduced in the LG G Flex and was later inherited by the device we are reviewing today – LG G Flex2.

Have LG reached their desired goal with the LG G Flex2, or does it still require improvement if it is to become the embodiment of their vision. We will find out in this quick review.

Contents


Design

This is one is the device’s key features, as we mentioned earlier. LG have already switched up quite a bit from the common design of smartphones by placing the volume rockers and sleep/wake button at the back of most of their devices, right under the camera. LG have done so because users naturally place their fingers at the back of their smartphone, so controlling the volume and unlocking the device feels more natural and intuitive this way. The next change in terms of design is curved display technology. The motive behind it is the same. A curved smartphone should have a more comfortable feel in our hand since our palms are more or less shaped that way.

LG G Flex2 face3
LG G Flex2 back2

Besides the button placement and curved shape, everything else is like in any other smartphone. LG G Flex2 features a clean, minimalistic, thin and light design, measuring at 7.1 mm profile and 152 g weight. It is considerably smaller than its predecessor in every dimension. The device is made out of plastic, but it doesn’t look and feel cheap. The predecessor of LG G Flex2 – LG G Flex – had an additional layer to its back panel. It gave it self-healing capabilities or, in other words, small scratches from keys, coins or something similar would disappear shortly after being inflicted. For that to happen you had to rub your finger across the scratch so that it heated up and soon after it would seem as if you had smudged the scratches off. This technology has been implemented and further improved in the G Flex2. The back cover of the device has been infused with concentrated hydrogen atoms. As soon as there is a displacement of the atoms, they are pushed together to their original location and thus “heal” the spot. This takes around 18x less time than it is was on the LG G Flex – around 10 seconds. The back panel of the device is removable, but its battery is not user accessible. Another key feature of the Flex line devices resides in their names. Last year’s G Flex could be temporarily straightened if you apply pressure against its back, while the device faced a flat surface. This year, due to the smaller dimensions of the phone, that seems harder and it feels as though the device may actually break if you go on pushing.

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The left and right side of the device don’t have any buttons, jacks or trays. On the bottom you will find a microUSB port with fast charging capabilities, a headphone jack and a microphone. At the top lies a secondary microphone, as well as an IR blaster that allows you to remotely control various devices, most commonly TVs.

Display

LG G Flex2 face 4LG G Flex 2 features a 5.5-inch, capacitive, multi-touch, Curved P-OLED display with resolution of 1080 x 1920 pixels. The pixel pitch between the blue sub-pixels is 0.0634 x 0.0634 mm (403 ppi), while the distance between the green sub-pixels is 0.0897 x 0.0897 mm (285 ppi). The screen can reproduce 16777216 colors, thanks to its 24-bit color depth technology. This display takes up a little over 74% of the side of the device. Corning Gorilla Glass 3 is what protects the screen from scratches, but LG have improved it, so its 20% tougher than the usual (Dura-Glass by LG). For the display to become “Retina”, it must be viewed at 23 cm (9”) or more. Viewing angles are great, but the device has been specially shaped to give the best viewing experience when looking directly into the it.

On the photo below you can view the order of the sub-pixels.

Micr-Flex2

There are tree screen modes available – “Standard”, “Vivid” and “Natural”. The default setting is on “Standard” mode and all the test results below are for it (with deactivated “Auto-brightness” and “Auto-adjust screen tone” in advance).

Screen mode-Flex2

The measured average maximum screen brightness is 325 cd/m2. The color temperature, measured on a white screen, set at the aforementioned maximum brightness, is 8300K – cold, daylight type. Contrast ratio is excellent – theoretically it tends to infinity, because the OLED pixels are self-illuminating and at blacks they are just switch off.

Brightness-Flex2

Color Gamut coverage (CIE)

LG G Flex2’s display covers 97% of sRGB and 88% of the Adobe RGB color gamuts.

CIE-Flex2

PWM

The display of LG G Flex2 doesn’t put a strain on the eyesight via pulse-width-modulation of the emitted light, at any brightness level. Using the device for long periods of time won’t exhaust your eyes.

PWM-Flex2

Conclusion

LG G Flex2’s display has excellent contrast and viewing angles, covers 97% of sRGB, and st is friendly to the users sight. However, the maximum brightness might not ensure comfortable reading or viewing content when the screen is faced directly at sunlight.

Battery life

The battery in the LG G Flex2 has a 3000 mAh capacity. Thanks to the big energy unit and the software optimizations, the device got good results in our tests and met our expectations in most of them.

We conducted our tests in the usual manner – talk time, web browsing, video playback and gaming at 120cd/m2 screen brightness, turned on Wi-Fi and turned off GPS and Bluetooth.

Battery Comparison

In this test the screen doesn’t affect the battery life, since the proximity sensor turns it off during phone calls.

Smartphones Results (min.) Result
difference
Price
LG G Flex2 3000 mAh, 5.5-inch, Curved P-OLED, Qualcomm Snapdragon 810 (MSM8994) 918 0 % Check price
LG G3 (3GB RAM) 3000 mAh, 5.5-inch, IPS+, Qualcomm Snapdragon 801 (MSM8974AC) 1500 63.4 % Check price
Samsung Galaxy Note 4 3220 mAh, 5.7-inch, Super AMOLED, Samsung Exynos 5 Octa (5433) 1883 105.12 % Check price
Samsung Galaxy S6 edge 2600 mAh, 5.1-inch, Super AMOLED (curved), Samsung Exynos 7 Octa (7420) 1313 43.03 % Check price
Apple iPhone 6 1810 mAh, 4.7-inch, IPS, Apple A8 (APL1011) 857 – 6.64 % Check price

We run our Web surfing test with a custom-made script, which browses through 70 popular web pages.

Smartphones Results (min.) Result
difference
Price
LG G Flex2 3000 mAh, 5.5-inch, Curved P-OLED, Qualcomm Snapdragon 810 (MSM8994) 445 0 % Check price
LG G3 (3GB RAM) 3000 mAh, 5.5-inch, IPS+, Qualcomm Snapdragon 801 (MSM8974AC) 466 4.72 % Check price
Samsung Galaxy Note 4 3220 mAh, 5.7-inch, Super AMOLED, Samsung Exynos 5 Octa (5433) 652 46.52 % Check price
Samsung Galaxy S6 edge 2600 mAh, 5.1-inch, Super AMOLED (curved), Samsung Exynos 7 Octa (7420) 696 56.4 % Check price
Apple iPhone 6 1810 mAh, 4.7-inch, IPS, Apple A8 (APL1011) 573 28.76 % Check price

This test uses the same custom-made script, but we use 3G connection instead of Wi-Fi.

Smartphones Results (min.) Result
difference
Price
LG G Flex2 3000 mAh, 5.5-inch, Curved P-OLED, Qualcomm Snapdragon 810 (MSM8994) 0 % Check price
LG G3 (3GB RAM) 3000 mAh, 5.5-inch, IPS+, Qualcomm Snapdragon 801 (MSM8974AC) 0 % Check price
Samsung Galaxy Note 4 3220 mAh, 5.7-inch, Super AMOLED, Samsung Exynos 5 Octa (5433) 0 % Check price
Samsung Galaxy S6 edge 2600 mAh, 5.1-inch, Super AMOLED (curved), Samsung Exynos 7 Octa (7420) 480 0 % Check price
Apple iPhone 6 1810 mAh, 4.7-inch, IPS, Apple A8 (APL1011) 0 % Check price

For this test we use a looping 720p movie.

Smartphones Results (min.) Result
difference
Price
LG G Flex2 3000 mAh, 5.5-inch, Curved P-OLED, Qualcomm Snapdragon 810 (MSM8994) 673 0 % Check price
LG G3 (3GB RAM) 3000 mAh, 5.5-inch, IPS+, Qualcomm Snapdragon 801 (MSM8974AC) 567 – 15.75 % Check price
Samsung Galaxy Note 4 3220 mAh, 5.7-inch, Super AMOLED, Samsung Exynos 5 Octa (5433) 817 21.4 % Check price
Samsung Galaxy S6 edge 2600 mAh, 5.1-inch, Super AMOLED (curved), Samsung Exynos 7 Octa (7420) 844 25.41 % Check price
Apple iPhone 6 1810 mAh, 4.7-inch, IPS, Apple A8 (APL1011) 594 – 11.74 % Check price

In order to simulate 3D gaming, we use Epic Citadel cycles at High Quality setting.

Smartphones Results (min.) Result
difference
Price
LG G Flex2 3000 mAh, 5.5-inch, Curved P-OLED, Qualcomm Snapdragon 810 (MSM8994) 261 0 % Check price
LG G3 (3GB RAM) 3000 mAh, 5.5-inch, IPS+, Qualcomm Snapdragon 801 (MSM8974AC) 219 – 16.09 % Check price
Samsung Galaxy Note 4 3220 mAh, 5.7-inch, Super AMOLED, Samsung Exynos 5 Octa (5433) 253 – 3.07 % Check price
Samsung Galaxy S6 edge 2600 mAh, 5.1-inch, Super AMOLED (curved), Samsung Exynos 7 Octa (7420) 241 – 7.66 % Check price
Apple iPhone 6 1810 mAh, 4.7-inch, IPS, Apple A8 (APL1011) 258 – 1.15 % Check price

Software

LG G Flex2 runs Android 5.0.1 Lollipop with LG’s UI on top. The advancement of the Android OS and UI’s in general in the last couple of years is huge.

LG’s UI isn’t a very heavily skinned one. Yeah, sure, it changes the appearance of the icons and menus to some extent, while adding new functionality, but it doesn’t hamper the device as much as some other UIs, like Samsung’s TouchWiz for example.

Home Screen

The home screen is pretty customizable – starting from the widgets you can add or change the icons of different apps, and a lot more. There is also a cool animation added to swiping in a direction when there are no more screens available – the images start to stretch the way you are pulling them. Little things like that could really satisfy some eye-candy lovers.

Screenshot_2015-05-24-17-43-43
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Lock Screen

You can set up different ways to unlock your device, while default is a swipe and its animation is pretty cool. From the lock screen you have access to the notification bar.

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Knock ON and Knock Code

LG’s original way of unlocking their devices – Knock ON, is present is the LG G Flex2. To use that function you just simply double tap on the screen to wake your device when locked, and double tap on an empty space on the screen to lock it when unlocked. In addition to this feature, the G Flex2 has Knock Code. Knock code allows you to unlock your screen with a password, without ever turning it on. They way it works is that you create your own Code by taping in four different squares in a pattern of your liking, and after you’ve done that all you need to do is repeat the same code anywhere on the screen.

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Screenshot_2015-05-24-17-45-43
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Screenshot_2015-05-24-17-40-15

Gestures

There are some gestures you can activate to control your device faster and easier. You can see what these gestures are and how to use them in the screenshots below.

LG G Flex 2 gestures

Dual Window

The Dual window feature is also present on the LG G Flex2. It allows you to operate with two apps on the screen at the same time.

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Screenshots from the settings menu and others

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Performance

LG G Flex2 comes with the high-end Qualcomm SoC – Snapdragon 810. It is based on ARM’s big.LITTLE architecture, which combines different CPU cores for an optimal compound of performance and power consumption. Snapdragon 810 is an octa-core SoC, in which the eight cores are grouped into two quad-core clusters. One of the clusters is made to deal with more demanding apps – Cortex-A57, clocked at 2GHz. The other one has four slower, but much more efficient Cortex-A53 cores clocked at 1.5 GHz, which will handle background tasks and simple applications. Just like the Snapdragon 615, all eight cores can be active at the same time, but there still aren’t many applications that make good use of that.

The GPU integrated in the SoC is an Adreno 430 GPU with a 2x 32-bit memory controller (LPDDR4-3200, 25.6 GB/s). It outperforms its predecessor – Adreno 420, be roughly 30 percent. The chip is slightly faster than the PowerVR GX6450 (Apple A8), but somewhat slower than the Mali-T760 MP8 (Exynos 7420).
The new 20 nm process brings about improved energy efficiency, compared to its 28 nm predecessor.

Below you can see the results that the LG G Flex2 got in our benchmark tests and how it compares to other flagship devices.

CPU Performance

Geekbench 3.0 is Primate Labs cross-platform processor benchmark which simulates real-world scenarios and gives a combined score, based on the results of integer, floating point and memory performance.

Smartphones Results Result
difference
Price
LG G Flex2 Qualcomm Snapdragon 810 (MSM8994) (4-core, Cortex-A57, 2 GHz), 2GB RAM 0 % Check price
LG G3 (3GB RAM) Qualcomm Snapdragon 801 (MSM8974AC) (4-core, Krait 400, 3GB RAM 2381 0 % Check price
Samsung Galaxy Note 4 Samsung Exynos 5 Octa (5433) (4-core, 3GB RAM 3686 0 % Check price
Samsung Galaxy S6 edge Samsung Exynos 7 Octa (7420) (4-core, 000, 2.1 GHz), 3GB RAM 4469 0 % Check price
Apple iPhone 6 Apple A8 (APL1011) (2-core, 1.4 GHz), 1GB RAM 2880 0 % Check price

Metal 3 is the latest version of Vellamo’s CPU benchmark.

Smartphones Results Result
difference
Price
LG G Flex2 Qualcomm Snapdragon 810 (MSM8994) (4-core, Cortex-A57, 2 GHz), 2GB RAM 1300 0 % Check price
LG G3 (3GB RAM) Qualcomm Snapdragon 801 (MSM8974AC) (4-core, Krait 400, 3GB RAM 1575 21.15 % Check price
Samsung Galaxy Note 4 Samsung Exynos 5 Octa (5433) (4-core, 3GB RAM 1832 40.92 % Check price
Samsung Galaxy S6 edge Samsung Exynos 7 Octa (7420) (4-core, 000, 2.1 GHz), 3GB RAM 2670 105.38 % Check price
Apple iPhone 6 Apple A8 (APL1011) (2-core, 1.4 GHz), 1GB RAM 0 % Check price

Vellamo 2 Metal measures the CPU subsystem performance of mobile processors.

Smartphones Results Result
difference
Price
LG G Flex2 Qualcomm Snapdragon 810 (MSM8994) (4-core, Cortex-A57, 2 GHz), 2GB RAM 1400 0 % Check price
LG G3 (3GB RAM) Qualcomm Snapdragon 801 (MSM8974AC) (4-core, Krait 400, 3GB RAM 1296 – 7.43 % Check price
Samsung Galaxy Note 4 Samsung Exynos 5 Octa (5433) (4-core, 3GB RAM 0 % Check price
Samsung Galaxy S6 edge Samsung Exynos 7 Octa (7420) (4-core, 000, 2.1 GHz), 3GB RAM 1595 13.93 % Check price
Apple iPhone 6 Apple A8 (APL1011) (2-core, 1.4 GHz), 1GB RAM 0 % Check price

GPU Performance

The T-Rex 2.7 test is based on ES 2.0/GL 3.0 and includes highly detailed textures, materials, complex geometry, particles with animated textures and a post-process motion blur effect. The graphics pipeline also features planar reflections, specular highlights and soft-shadows.

Smartphones Results Result
difference
Price
LG G Flex2 Qualcomm Snapdragon 810 (MSM8994); GPU: Adreno 430 GPU, 0.65 GHz ; 2GB RAM 45 0 % Check price
LG G3 (3GB RAM) Qualcomm Snapdragon 801 (MSM8974AC); GPU: Adreno 330, ; 3GB RAM 27.5 – 38.89 % Check price
Samsung Galaxy Note 4 Samsung Exynos 5 Octa (5433); ; 3GB RAM 37.7 – 16.22 % Check price
Samsung Galaxy S6 edge Samsung Exynos 7 Octa (7420); GPU: 000, 0.77 GHz ; 3GB RAM 59 31.11 % Check price
Apple iPhone 6 Apple A8 (APL1011); 0.45 GHz ; 1GB RAM 42.7 – 5.11 % Check price

The Manhattan 3.0 test is based on ES 3.0 / GL 4.1 and uses deferred rendering and multi-render target (MRT) for the geometry pass, diffuse and specular lightning. It also features complex effects such as depth shadow map, cloaking effect, post-process effects (bloom, depth of field), occlusion query and animated volumetric light shafts.

Smartphones Results Result
difference
Price
LG G Flex2 Qualcomm Snapdragon 810 (MSM8994); GPU: Adreno 430 GPU, 0.65 GHz ; 2GB RAM 22 0 % Check price
LG G3 (3GB RAM) Qualcomm Snapdragon 801 (MSM8974AC); GPU: Adreno 330, ; 3GB RAM 11.8 – 46.36 % Check price
Samsung Galaxy Note 4 Samsung Exynos 5 Octa (5433); ; 3GB RAM 17.3 – 21.36 % Check price
Samsung Galaxy S6 edge Samsung Exynos 7 Octa (7420); GPU: 000, 0.77 GHz ; 3GB RAM 26 18.18 % Check price
Apple iPhone 6 Apple A8 (APL1011); 0.45 GHz ; 1GB RAM 17.8 – 19.09 % Check price

In this test, 3DMark’s Unlimited engine uses a fixed frame interval and renders exactly the same frames in every run on every device. The frames are rendered in 720p “offscreen” while the display is updated with small frame thumbnails every 100 frames to indicate progress.

Smartphones Results Result
difference
Price
LG G Flex2 Qualcomm Snapdragon 810 (MSM8994); GPU: Adreno 430 GPU, 0.65 GHz ; 2GB RAM 23920 0 % Check price
LG G3 (3GB RAM) Qualcomm Snapdragon 801 (MSM8974AC); GPU: Adreno 330, ; 3GB RAM 16916 – 29.28 % Check price
Samsung Galaxy Note 4 Samsung Exynos 5 Octa (5433); ; 3GB RAM 14492 – 39.41 % Check price
Samsung Galaxy S6 edge Samsung Exynos 7 Octa (7420); GPU: 000, 0.77 GHz ; 3GB RAM 22523 – 5.84 % Check price
Apple iPhone 6 Apple A8 (APL1011); 0.45 GHz ; 1GB RAM 17482 – 26.91 % Check price

There have been a lot of rumors about the Snapdragon 810 overheating. We measured the temperatures that the LG G Flex2 reached, during 4K video recording, and compared it to those of Samsung Galaxy S6 edge which uses the Exynos 7420 SoC, to see if those rumors turn out to be true. In the image below you can see the temperatures we measured on each device.

After 5 min of 4K video recording

g flex 2 temp 1
s6 temp 1

After 10 min of 4K video recording

g flex 2 temp 2
s6 temp 2

You can read the full article here.

Camera

The LG G Flex2 sports a 13-megapixel (4160 x 3120 pixels) main camera with OIS+ and Laser Auto Focus, capable of recording 4K video at 30 fps and [email protected] The front-facing camera of the device has a 2-megapixel sensor that can record FullHD videos at 30 fps.

We took some sample photos in different light conditions.

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Conclusion

LG G Flex2 is a gorgeous, powerful and functional device. Thanks to its curved design, light weight and slim body it feels great in the hand. One of its great features is the healing back, which saves us the worries about small scratches. G Flex2’s display offers superb multimedia experience, and battery life is long enough to get you through the day. The SoC and all its components offer high performance, so using the device is a pleasure. The only drawback that we can think of is the overheating issues.

Pros

  • Great curved design and nice appearance
  • The display offers superb multimedia experience
  • Powerful SoC
  • Good looking UI with a lot of extra features
  • The camera takes excellent photos

Cons

  • The dreadful overheating issues of the Snapdragon 810 chip

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