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LG G4 vs LG G Flex 2 comparison: which is better?

The LG G4, LG's newest flagship phone, is not only competing with top-end devices from other manufacturers, it's battling against one of its own – the LG G Flex 2. Naturally this made us question which is the better smartphone. Read on to learn what we found out in our LG G4  vs LG G Flex 2 comparison.

LG G4  vs LG G Flex 2 comparison: Design

One of the biggest innovations that the G Flex series brought to the market is its flexible and curved display. While the first generation was criticized for its low resolution, the problem had been resolved by the release of the G Flex 2, which boasted full HD resolution.

The phone was also tougher than its predecessor, so we shouldn't see a repeat of 'Bendgate'. But it's still important not to overdo it with Flex phones; excessive force can break the screens. Generally speaking though, the G Flex 2 can easily be carried in the back pocket of your jeans and can handle being sat on.

lg g glex 2 Bend
The display of the LG G Flex 2 is flexible but don't overdo it. / © AndroidPIT

To protect the back of the phone, LG gave the G Flex 2 a 'self-healing' coating, which is able to resist most small, everyday scratches. Again, overdoing it – for example taking a key or a knife to the surface – will leave lasting damage. It's not indestructible.

The Korean manufacturer took few risks with the design of the LG G4. It looks like a cross between the G Flex 2 and the G3. The slightly curved display is reminiscent of the G Flex 2. It doesn't bend as much, but the display technology is quite different. More on the displays of both phones below.

The phones both have the classic LG Rear Keys and a rounded back. Even the dimensions and weight of these two flagships are nearly identical, differing only by a matter of a few millimeters and grams here and there.

lg g flex 2 scratch test new
The coating of the the G Flex 2 is scratch-resistant but not impenetrable. / © AndroidPIT

One immediately noticeable difference between the phones is the G4's leather back cover. It doesn't come as standard and will set you back about US$50, but it does look good. It provides a slightly better grip on the phone too, but really, upgrading would be an aesthetic decision.

LG G4  vs LG G Flex 2 comparison: Display

The display of the LG G Flex 2 was a great step forward, and the 5.5-inch full HD POLED panel was worthy of a flagship smartphone. Its black levels and colors are excellent, while the contrast is high enough to read in direct sunlight.

The IPS display of the LG G4 is vastly superior to that of the G Flex 2. / © AndroidPIT 

But when compared with the G4, the G Flex 2's display looks positively neanderthal. The IPS display of the LG Quantum G4 offers WQHD (1,440 x 2,560 pixels), meaning a huge 538 ppi – a massive leap up from the G Flex 2's 403 ppi.

But that's not all. The Quantam display technology is superior to the color reproduction of the sRGB standard, making for a more natural color that's almost comparable to the Digital Cinema Initiatives (DCI) standard. LG released the clip below just before the phone's launch to explain how it all worked.

When we tested it, the QHD display showed very bright and natural-looking colors. It was also able to handle viewing from different angles without losing clarity. The black levels on the G Flex 2 are still slightly better but brightness and color are both vastly superior in the LG G4.

LG G4  vs LG G Flex 2 comparison: Technical specifications

  LG G4 LG G Flex 2
Model: H815 Sorry, not yet available!
Manufacturer: LG LG
Dimensions: 148.9 x 76.7 x 9.8 mm 149.1 x 75.3 x 7.1 mm
Weight: 155 g 152 g
Battery size: 3000 mAh 3000 mAh
Screen size: 5.5 in 5.5 in
Display technology: LCD POLED
Screen: 2560 x 1440 pixels (534 ppi) 1920 x 1080 pixels (401 ppi)
Front camera: 8 megapixels 2.1 megapixels
Rear camera: 16 megapixels 13 megapixels
Flashlight: LED Dual-LED
Android version: 5.1 - Lollipop 5.0.1 - Lollipop
RAM: 3 GB 2 GB
3 GB
Internal storage: 32 GB 16 GB
32 GB
Removable storage: microSD microSD
Chipset: Qualcomm Snapdragon 808 Qualcomm Snapdragon 810
Number of cores: 6 8
Max. clock speed: 1.8 GHz 2 GHz
Connectivity: HSPA, LTE, NFC, Bluetooth 4.1 HSPA, LTE, NFC, Bluetooth 4.1

LG G4  vs LG G Flex 2 comparison: Performance

Measuring purely from the hard data, the LG G Flex 2 is nominally the more powerful of the two smartphones. But our test, run with AnTuTu, painted a different picture. The results showed the LG G4  Snapdragon 808 Hexa-core processor was just as good as the Snapdragon 810 in the LG Flex 2, while the throttling capabilities of the G4 are not as large as those of its competitor.

LG G4 Benchmark AnTuTu
For a hexa-core processor, the LG G4 benchmarks quite well. / © ANDROIDPIT
LG G Flex 2 Benchmark Antutu
When it's not overheating, the LG Flex 2 offers great performance. / © ANDROIDPIT

In reality, this means the G4 can operate at its power limit longer than the Flex 2. For that reason, and because the Flex 2 sometimes overheats during longer games such as Asphalt 8 or Real Racing 3, the G4 is the better choice for Android gamers who want to use their phone for long periods of time.

lg g flex 2 benchmark repeats
After running our test three times, the LG Flex 2 started to falter. / © ANDROIDPIT

LG G4  vs LG G Flex 2 comparison: Camera

This is one area where the decision is crystal clear. The LG G4 is without doubt a better choice for smartphone snappers. Both phones have a laser autofocus and an Optical Image Stabilizer but these have both been fine tuned to a much greater degree in the G4. Furthermore, the sensor in the newer model is significantly larger and offers a much better array of colors.

The picture galleries below show the potential of the cameras on the G4 and the G Flex 2 respectively, and demonstrate the clear difference between the two.

LG G4  vs LG G Flex 2 comparison: Battery

In terms of battery endurance, the two phones are similar. After a normal day's use, you can expect to have about 30 percent charge left. Both phones support Quick Charge 2.0, so you can get a few more hours of use with just a few minutes charging.

The G Flex 2 has a fixed battery. The battery in the LG G4 can be replaced. / © ANDROIDPIT

Another big advantage of the G4 is its removable battery, something the G Flex 2 doesn't have, although both devices have a slot for a microSD card. Both batteries have a 3,000 mAh capacity. The lower resolution of the G Flex 2 should mean that phone's battery lasts slightly longer.

LG G4  vs LG G Flex 2 comparison: Conclusion

So, after all this, which is the better phone? There are obvious disadvantages to the G Flex 2 but it would still be worth consideration if its price was significantly lower. Unfortunately this isn't the case – the second generation of the phone currently retails at about US$60 less than the new G4 (roughly $750 compared with $690), a pretty negligible saving in the context.

The only area in which the G Flex 2 has a real advantage is performance but even this is offset by the heat it generates and the subsequent throttling of the processor. It's in the display and the camera that the G4 holds its most significant advantages, but it's generally a superior phone and, for the sake of $60, there's really no choice between them.


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  • hmmm, so the g4 doesn't throttle at all after 3 runs of antutu.. itchy chin time

  • I too bought the G Flex 2 for $250! Incredible deal, incredible phone. 5.1.1 is vastly improved and the phone has no issues that bother me. No stutter, no and smooth. The ONLY thing I really wish it had was some exposure control in the camera. The camera takes great pictures, but in the sun, faces can be dark, with no way to lighten them up pre pic.
    Go get the GFlex2 on Ebay...Still there at $329 brand new!!!

  • Ryan Wood Sep 17, 2015 Link to comment

    i paid 190 for my g flex 2 with 32gb storage.its amazing.five updates have made the phone run drop it it doesnt break.the g4 is underpowered.the curve watching youtube videos feels great.all reviews about the g.flex 2 concentrate on when it first came out.not recent reviews.lg sorted it out and it runs perfect and is very cheap compared to flagship phones and a lot tougher

  • I picked up an LG G Flex 2 on Ebay for $250 shipped tax free. There is a fire sale currently on that model and it's a no brainer since the Lollipop 5.1.1 update fixed the Snapdragon 810 throttling.

  • They both are equally worthless.

  • Dylan S. Aug 25, 2015 Link to comment

    Lg g4 all the way. It's way better

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