LG G4 review: Killer camera, killer display, but not a revolutionary smartphone

At a Glance
  • LG Electronics G4

    Greenbot Rating

    With awesome manual camera settings and a gorgeous display, the LG G4 is one of the best phones of the year. Depending on your preferences, it might even be THE best phone.


Updated with new details on video modes and quick-charging.

If you plan to rock the LG G4, please be prepared to account for your decisions. Samsung phones thoroughly dominate the Android space, so you have to share a veritable LG origin story whenever explaining an LG phone to non-nerd looky-loos. People are often suspicious of the rare and exotic. And that’s a shame because the G4, LG’s latest flagship phone, is a remarkable handset in many ways.

The G4 has the best manual camera package in the smartphone space. Its display looks great. You can swap out the G4’s battery when juice runs low. You can upgrade storage with a microSD card. And LG doesn’t muck up the basic Lollipop experience with excessive bloatware and customization.

The G4 isn’t perfect. And if you’re already using last year’s G3, you probably don’t need to upgrade to the G4. But if your phone is two years old, you need to look very, very hard at the G4 before buying Samsung’s Galaxy S6 in a hypnotic, hype-induced trance.

lg g4 beauty 3 Rob Schultz

The G4’s 5.5-inch display is just a bit taller and wider than the 5.1-inch display of Samsung’s GS6.

Vaguely upgraded industrial design

I reviewed the international version of the phone. LG says it offers a slightly different software experience than the U.S. model, and my review unit didn’t feature LG’s ballyhooed leather backing, which we found to be as luxurious as a Mercedes-Benz steering wheel. I’m sorry I didn’t get the leather package, as LG hasn’t upgraded its basic plastic chassis in any material way.

Relative to the G3, the G4’s rear plastic has a faint honeycomb pattern instead of faux brushed metal, and looks as downmarket as ever compared to fancy-pants iPhones and the finally-better-than-ever Samsung Galaxy S6. The G4’s materials are bit too satin-slippery for my tastes (leather would fix that), and aside from being a wee bit taller, it looks almost exactly like the G3.

LG g4 camera power 2 Rob Schultz

Even a faux metal finish can’t hide chintzy materials. And some people still won’t like that rear-mounted power button.

This is a missed opportunity, LG. The leather version is a polarizing option, and the industrial design of the basic version now falls a distant third behind Samsung and HTC flagship phones.

On the upside, I’ve always found the G3 (and now the G4) to offer the perfect compromise between screen size and ergonomics. I can comfortably type and navigate the interface with a single hand, and like the G3, the G4 has a very thin bezel surrounding its 5.5-inch display. The end result is phone that makes wonderfully efficient use of available space. The power and volume buttons are still located on the rear, and there’s no physical home button. Neither decision bugs me, but if you think it will bug you, well, you’ve been warned.

lgg4 8987 Florence Ion

Should you prefer leather, well, LG does have that option.

Now, that’s a colorful display

LG has significantly improved its flagship display, and it’s something you’ll notice the moment you turn on the G4 if you’ve had any experience with the G3. Using an “IPS Quantum” LCD that employs technology similar to quantum-dot TV tech, LG says it has increased color gamut by 20 percent and brightness by 50 percent.

Pixel density remains an ungodly 538 ppi across a 2560x1440 “Quad HD” resolution, but the real story here is gorgeous color reproduction. Comparing identical high-res photos on the G4 and G3, you can see richer, fuller tones on LG’s updated display. It’s a dazzling visual experience that doesn’t bear that trademark over-saturation we’ve seen in so many AMOLED phones.

LG g4 color Rob Schultz

Here we see the G4 (left) and G3 (right) displaying an identical photo. Notice the more vibrant colors in the updated display. Click to enlarge.

That said, the G4’s pure white reproduction has a distinctly cool (bluish) cast to it, while Samsung’s GS6 really is pure white when in its Basic white-point calibration mode. I don’t plan on doing any mission-critical content creation on my smartphone, so the cool cast doesn’t alarm me. But I can see how hardcore photographers might want a more accurate display, because the G4’s camera is just that good.

It’s like a DSLR in your pocket

Samsung made a splash with manual camera controls in the GS6, but LG advances the ball even further. Both phones give you controls for exposure compensation, focus, ISO and white balance, but the G4’s 16-megapixel rear camera adds an all-critical shutter speed slider, along with a RAW file format option. The end result is a manual camera package that offers an unprecedented level of control—and it’s super fun to use.

lg g4 camera contol interface

Note the fine level of manual controls for still images. A Histogram is in the top-left corner. An ISO slider appears toward the right.

The G4’s aperture is f/1.8, which delivers solid low-light image capture, and makes for artsy depth-of-field effects when playing with manual focus. Note the foreground and background detailing as I change focus in the images below.

lg g4 manual focus effect Jon Phillips

Sharp foreground, blurry background. Blurry foreground, sharp background. For this we thank manual focus and an f/1.8 aperture. Click to enlarge.

I had even more fun with the shutter speed control. It ranges from 1/6000 to a full 30 seconds, and when you choose extremely long shutter speeds in near darkness, the camera sensor can collect an insane amount of light for breathtaking effects. If you end up buying the G4, place the phone on a tripod of some sort, and start playing with shutter speed and ISO in extremely dark environments. Click the images below to see my long-shutter test shots in full effect.

lg g4 long exposure effects Jon Phillips

All of these long-exposure images were shot in a very dark room. For the most part, only a skylight overhead provided light. On the left, I have a 30-second exposure at ISO-150 (the lamp was actually dimmed to within an inch of its life). In the middle, I have a 30-second exposure at ISO-300. On the right, the skylight itself gave me plenty of moonlight for a 15-second exposure at ISO-800. Click to enlarge.

Besides simply yielding beautiful photos, the G4 serves as an excellent teaching tool. I’m a digital photography newbie, and while I understand the basic concepts behind white balance, ISO, and shutter speed, I’ve never mastered how they all work together on my Canon DSLR. But thanks to the G4’s full-display preview, I can see how small adjustments to manual settings will affect my final image capture. There’s even a teeny-tiny Histogram in the upper-left corner to see your photo’s tonal range before you snap.

Shooting off shots like a machine gun

The G4’s camera package is more if a mixed bag when you leave the still-photo manual settings. In auto mode, the rear camera’s laser focus did a fantastic job of quickly adjusting focal length as I panned across objects at varying distances away. I was also super-impressed with the camera’s burst mode: Hold down the shutter button in auto mode, and you’ll snap multiple still shots like you’re firing a machine gun.

low light g4 vs gs6

Here’s how the G4’s auto setting compares to the GS6 in low-light environments. Doing our best to recreate the atmosphere of a moody bar, we turn on a single floor lamp in a very dim room, and snap a photo without any flash.

But in that same auto mode, the camera performed only admirably—but not amazingly—in low light situations. This despite LG’s class-leading aperture spec. The upshot: The G4 will never be a miracle worker when you’re shooting party shots in a darkened tavern, but remember that manual mode is available if you want to experiment with longer shutter speeds (just keep your phone very, very still).

studio lights g4 vs gs6

Despite having a slightly wider aperture (f/1.8 versus f/1.9), the GS6 takes slightly better images—again, with auto settings enabled—under two bright studio lights.

I was also disappointed to discover that the video camera is almost bereft of controls. You can play with optical zoom and toggle auto-focus on and off, but there’s no slow-motion mode, let alone any of the advanced manual controls that are available to still images. (Update: It turns out LG hides settings for slo-mo and three video resolution options under the aspect ratio menu of its still camera. It’s an unusual place to stow video settings, but they do exist.)

LG g4 selfie 2 Rob Schultz

You can snap a selfie with a simple hand gesture. It’s a cool trick should you need to impress a Kardashian at some point in your life.

The G4’s 8-megapixel front camera is entirely geared toward selfies. There’s an 8-stage auto-beautify slider that lets you choose from zero digital air-brushing to more facial scrubbing than you’d wish on a South Korean plastic surgery addict. You can also trigger selfie shots with a hand gesture (it worked as expected) and a number of voice commands like “cheese” and “kimchi” (it didn’t work at all on my particular early-build review unit).

Fast enough, long enough

LG outfitted the G4 with 3GB of RAM and a six-core 1.8GHz Snapdragon 808 processor instead of the eight-core Snapdragon 810 that it uses in the G Flex 2, and that HTC uses in the One M9. Conventional wisdom says the ostensibly higher-performing Snapdragon 810 overheats when you really hammer the processor for extended periods, and this causes its host phones to throttle down performance (@C4ETech has a great video about this here).

lg g4 benchmarks antutu

Antutu is an overall benchmarking suite. Here we see the G4’s performance falls behind the Samsung and HTC flagships, but I didn’t notice any performance issues whatsover during actual use.

Well, overheating was certainly never an issue throughout five days of testing the G4. The phone never once got hot to the touch (I can’t say the same for the G3), and basic interface performance never lagged to any noticeable degree, even during multi-tasking scenarios involving multi-megabyte file transfers. Our benchmarks show that the G4 doesn’t have the raw processing power of the Galaxy S6 or even a non-throttling One M9. But during real-world use, I didn’t feel the G4 was wanting for power.

lg g4 benchmarks pcmark

The G4 closes up the gap in PCMark, and even bests the HTC One M9.

Battery tests indicate the G4’s longevity on a single charge lags behind the Samsung GS6’s, but I never found myself desperate for a recharge before turning in for the night. In fact, while the G4 has the same 3000 mAh battery as the G3, I found the new phone’s battery lasts noticeably longer, if only because the G3 took a palpable power-consumption hit when it received its Lollipop update.

lg g4 benchmarks battery

And here we see battery performance. But remember: These are only benchmarks, not real-world use.

Unfortunately, the G4 doesn’t support quick-charging, which is a top-line feature of the GS6 and most other flagship phones. That’s a huge letdown, as we found Samsung’s quick-charging feature to work like a dream, as advertised. The G4 also lacks wireless charging support out of the box, despite the fact that its chipset supports this feature.

(Update: Since this review was published, LG confirmed with Greenbot that quick-charging is now supported. It turns out that LG needed more time to thoroughly test Quick Charge 2.0 on the phone’s 808 processor, and LG’s engineers were wary of promoting the feature before it had fully vetted.)

Travel with a second juice box

The G4 is still the only flagship smartphone to offer a removable/swappable battery. So if you’re inclined to buy a second battery—and don’t forget the wall charger—you can pop open your case in emergency situations to enjoy the best battery life around. There’s just no denying the convenience of this feature, even despite the fact that LG’s rear chassis is difficult to pry apart with fingernails alone.

LG g4 battery Rob Schultz

Ultimately, this is the battery you’ll be replacing.

Yep, you’ll need a spudger tool if you want to avoid shucking the shell with a butter knife. That said, it remains to be seen whether the G4’s rear panel pops off when you drop the phone on a hard surface. That’s happened to me a number of times with the G3, leading to some frightening moments—especially that one time when the battery itself also popped out. (Luckily, the sudden loss of power didn’t damage the phone.)

The first time you open your case for a battery swap, you should also take the time to locate your microSD card expansion slot: It directly integrates with the SIM card slot. The G4 comes with 32GB of internal storage standard, but you can add another 128GB.

LG g4 speaker Rob Schultz

Somehow, you’ll need to pry this sucker off.

Reading and writing to the expansion card won’t be as fast as operations that tap built-in storage, but at least you’ll have space for movie files and those 6MB images shot by the G4’s camera. The Samsung GS6 comes in 32, 64 and 128 gig iterations, but its case is locked down, so adding storage via an SD card is out of the question.

An inoffensive Android skin

Like LG’s G3, the G4’s Android skin employs a relatively flat, inoffensive design that’s light on excessive customization. The G4 is also light on pre-installed bloatware, and overall I give LG kudos for letting its Android phone just be Android without a lot of OEM distractions. You can toggle off LG’s Smart Bulletin (which gives you quick access to music controls, your calendar, and interface tips, among other things), and even LG’s custom browser has been 86ed in favor of Chrome.

lg g4 ui

You can unlock the phone with a simple swipe if your “trusted agents” are set. Smart Bulletin (center) can be turned off entirely, and your home screen is, well, just a home screen.

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