Google's first hardware collaboration with LG brought us the Nexus 4. Like the Nexus 7, the Nexus 4 followed a philosophy of bringing as much power and quality as possible to a reasonably affordable price point. The Nexus 4 definitely wasn't a perfect phone, but it was certainly good relative to its price, and it showed that a phone can still be good even if it doesn't cost $600. About one year later Google and LG collaborated again to bring us the Nexus 5, a device which I and many other users fondly remember as an affordable phone that actually brought many of the specifications you would expect to see in a device that was priced significantly higher.

While I'm sure many hoped that 2014 would bring the next iteration of an LG Nexus device, it wasn't meant to be. Instead we got the Nexus 6 made by Motorola, which didn't really follow the pricing philosophy of the LG Nexus devices, and wasn't very competitive with devices like the Galaxy Note 4 despite its equivalent cost. At that point the future of affordable Nexus devices was unclear, and I wasn't even sure if we'd see a true successor to the Nexus 5. Fortunately, this year is the year that LG returns to bring us the next iteration of their Nexus phones, with the new device appropriately being named the Nexus 5X. With two years of hardware advancements between releases the expectations are high for this new phone, and you can check out its specs below.

  Google Nexus 5 Google Nexus 5X
SoC Qualcomm Snapdragon 800 (MSM8974)
4 x Krait 400 @ 2.26GHz
Qualcomm Snapdragon 808 (MSM8992)
​4 x Cortex A53 @ 1.44GHz
2 x Cortex A57 @ 1.82GHz
GPU Adreno 330 @ 450MHz Adreno 418 @ 600MHz
NAND 16/32GB
Display 4.95" 1920x1080 IPS LCD 5.2" 1920x1080 IPS LCD
Dimensions 137.84 x 69.17 x 8.59mm, 130g 147.0 x 72.6 x 7.9 mm, 136g
Camera 8MP Rear-Facing, f/2.4, 1.4 μm
1.2MP Front-Facing, F/2.2
12.3MP Rear-Facing, f/2.0, 1.55 μm
5MP Front-Facing, F/2.0, 1.4 μm
Battery 2300 mAh 2700 mAh
Launch OS Android 4.4 KitKat Android 6.0 Marshmallow
Cellular Connectivity 2G / 3G / 4G LTE (Qualcomm MDM9x25 UE Category 4 LTE) 2G / 3G / 4G LTE (Qualcomm X10 LTE)
Other Connectivity 1x1 802.11a/b/g/n/ac + BT 4.0, Micro-USB 2.0 2x2 802.11a/b/g/n/ac + BT 4.2, USB Type-C 2.0
Launch Price $349 (16GB) $379 (16GB)

Based on the specs you see on paper the Nexus 5X appears to represent an improvement over the Nexus 5 in every respect. Of course, it would be shocking if the successor to a two year old device didn't improve on it in every way, but we've actually seen some flagship Android phones regressing this year so such a scenario wouldn't be far removed from reality. The SoC moves from Snapdragon 800 to 808, but both the RAM and the internal storage remain the same. The display is slightly bigger, and with that comes a larger chassis and battery. The cameras receive significant upgrades, and I'll be talking about that in much more depth later in the review. Finally, both LTE and WiFi speeds receive a boost, and the starting price does jump a bit to $379 from the Nexus 5's $349.


One can't really discuss the design of the Nexus 5X without comparing it to the Nexus 5. Both devices are made by LG, and when looking at the two phones one can clearly see that they use similar materials and share visual characteristics. However, the body of the Nexus 5X definitely diverges from the Nexus 5 in a number of ways, and I think the changes ultimately make for a more refined and cohesive design.

From the back it's made even clearer how the design of the Nexus 5X has matured from the Nexus 5. Google has moved the camera to the center of the back, much like its position on the Nexus 6. Beneath it is a fingerprint scanner, which Google brands as Nexus Imprint, and it's something I'll be discussing later in the review. To the left of the camera is the IR laser which handles the camera's auto-focus. The camera itself definitely has a significant hump, with it being about the same thickness as the hump on the Samsung Galaxy S6. We can talk about how this means the device isn't perfectly flat on a table and won't slide through a slot with a width of exactly 7.9mm, but if the end result is a much better camera then I'm honestly fine with the trade off, even if it might be viewed as somewhat unsightly.

The most striking difference is actually a fairly subtle one, which is the curvature of the corners and edges of the phone. On the Nexus 5 the top and bottom edges were actually curved, and they changed to the flat left and right edges at fairly sharp corners. On the Nexus 5X all the edges of the phone are flat, and there's a much more consistent curve at the corners as the edges are perpendicular rather than meeting at an angle greater than 90 degrees.

Like the Nexus 5, the 5X has a noticeable seam between the back cover and the front of the phone. This is more noticeable on the dual-tone quartz and ice colored versions, because the color abruptly changes to black. Like the corners of the phone, the back cover now curves toward the edges of the chassis, rather than changing abruptly with very little curvature like the Nexus 5 did. One could argue that all of these changes actually makes the device less-than-unique, as the more angular design of the Nexus 5 allowed it to stand out. While this is definitely true to an extent, the phone is still clearly a Nexus device, and you wouldn't confuse it with an iPhone or a Samsung Phone, or really even an LG-branded phone.

A small detail that's worth mentioning is a change in the volume and power buttons. Unlike the Nexus 5 they're now all on the right side. When I first got a device that used this arrangement it definitely took time to get used to, but now I don't really have any qualms with it. What is worth noting is that the power button doesn't have the etched texture that the one on the Nexus 6 did, but Google has spaced the buttons out an appropriate amount to ensure that you can tell whether you're touching the volume rocker or the power button. The material of the buttons has been changed though. The Nexus 5 used ceramic buttons that were much sharper and more slippery than the rest of the chassis, but on the 5X the buttons are made of the same plastic as the sides of the phone. I personally thought the ceramic buttons actually just made it harder to feel which side of the volume rocker you were on, and I have no complaints about the change on the 5X.

The front of the device can be a bit deceiving. On the top you have a speaker grille, the front-facing camera to the left of it, and an ambient light sensor. Below the display you have another speaker grille. However, the Nexus 5X does not have stereo speakers, and the top portion simply acts as the earpiece, while the bottom is the speaker used when playing general audio. The speaker itself is also pretty poor quality, with pretty obvious distortion and a generally muffled output. I was really surprised to find that it sounds worse than an iPhone 5s even when the 5s is at a higher volume, especially because I hardly hold the iPhone's downward-facing mono speaker in high regard. The fact that the speaker is front-facing definitely prevents it from being covered when you hold the phone, but my admittedly highly subjective evaluation is that the speaker quality hasn't really improved from the Nexus 5.

The last thing I wanted to comment on is the overall size of the device. Google has certainly slimmed down the body, but the larger display necessitates a wider and taller chassis. While the increases don't seem like much, they're enough to put the Nexus 5X a bit outside my comfort range. It's worth noting that I have a great amount of trouble handing large phones, while for many users the increase in size going from the Nexus 5 to the 5X may be no problem at all. For me specifically, I definitely find the Nexus 5 easier to handle. That being said, if I could transplant the Nexus 5X's internals into the Nexus 5 I wouldn't do so, because while the 5X may be a bit too big for my tastes, the ergonomics are greatly improved and that definitely contributes to a better overall feel in the hand.

For $379, the Nexus 5X gives you a solid plastic build without any flex, and that's all I really expected and wanted from a successor to the Nexus 5. For users who want a more premium-feeling device the Nexus 6P is certainly an option, but you'll obviously end up paying more for it, and I think the price has always been the most attractive aspect of the LG Nexus smartphones.

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  • Brandon Chester - Tuesday, November 10, 2015 - link

    We use iPerf 2 as well, with similar settings but a 60 second test period and only a single thread. 5X is on the latest firmware from Google, and the router is an Archer C7. The phones are always tested right beside the router.

    I actually tested the Nexus 6 and Galaxy S6 in the exact same configuration to make sure there wasn't some bug, and they achieved the same speeds that we've recorded previously.
  • Kumar Anand - Tuesday, November 10, 2015 - link

    Brandon - Thanks for your reply. This explains the difference. Here is my explanation.

    With single iperf stream, the CPU utilization is not enough for Nexus 5X and hence due to aggressive power save on Nexus 5X, the CPU clock frequency is likely scaling down impacting the overall Wi-Fi end to end throughput. Hence it is not really the Wi-Fi but the CPU power save that is preventing us from realizing the full capacity of Wi-Fi. Think of this as the classic performance vs power trade off. Nexus 5X has very good battery life due to aggressive power save policy. Other devices might not have as aggressive CPU scaling policy as Nexus 5x and hence do not impact the Wi-Fi TPUT even with the single iperf stream.

    If the intention is to see how much (maximum) TPUT Nexus 5X Wi-Fi can handle or achieve, we should pump enough traffic to take the CPU scaling behavior out of the equation. If you run with -P3 iperf option and pump 3 iperf traffic streams, you can realize the full capacity of Wi-Fi throughput. I am able to achieve more than ~600 Mbps consistently with -P3 option.

    In summary - the following statement "Nexus 5X's WiFi performance is not very high for a dual spatial stream 802.11ac implementation" is not accurate. A dual spatial stream 11ac chip (like the one in Nexus 5x) can definitely achieve more than ~600 Mbps but you just need to pump enough traffic. I would be very curious to see your revised comparative numbers with -P3 option.

    Thank you.
  • Kumar Anand - Tuesday, November 17, 2015 - link

    Hi Brandon - Did you run comparative tests with iperf -P3 option? Are you considering including the revised numbers with -P3 option? For achieving peak performance we should pump 3 streams of iperf traffic. This will really test what is the "max" throughput each of the phones can handle.
  • FL777 - Tuesday, November 10, 2015 - link

    Great review. Your phone reviews are the best on the internet with the one exception of your iPhone 6S review where you fall in love with the Apple SoC so much that you start gushing. Yeah the iPhone 6S is the fastest phone on the planet, but it lacks a lot of the sophisticated and very useful features that the Samsung 6S Edge and the Samsung Note 5 have.

    Google has really stepped up with teh 5x. The 6p is supposed to be a super phone also. I can't wait to see what the Galaxy S7 will look like. It's SoC is supposed to be a beast and the camera is supposed to be the first smartphone camera that rivals dedicated cameras.
  • Hanknah - Tuesday, November 10, 2015 - link

    Do you know of any reason why the Nexus 5x seems to be currently priced at USD $450-550? has it from 450-510 and the google store has it from 500-550. I live in Canada so the google store might be showing me Canadian prices but is showing the numbers in USD I'm pretty sure
  • Ryan Smith - Tuesday, November 10, 2015 - link

    The 5X is being sold directly by Google in the US. So Amazon prices would be reseller prices I expect.
  • Goodspike - Tuesday, November 10, 2015 - link

    What would be nice is to have test comparisons of new mid-range devices to high end devices from 3-4 years ago. I tried to go back and look at some earlier reviews, but many of the tests have changed (even ones with the same names). But my point is by doing so people would know if they could save money by foregoing something faster than what they have now.
  • evolucion8 - Tuesday, November 10, 2015 - link

    I had the Nexus 5 and I wasn't that fond of it, It felt cheaper and less premium compared to the Nexus 4, the camera was horrible when taking pictures and videos, the battery life was disappointing and the SOC would throttle a lot! I returned it and got its brother, the LG G2 and its so much better on every discipline, much better battery life, better screen, much better camera and better build quality. My only grief is that its list of custom ROMs is much smaller compared with what you can get for the Nexus 5, :-(
  • jay401 - Tuesday, November 10, 2015 - link

    Does this phone have WiFi Calling?
  • Brandon Chester - Tuesday, November 10, 2015 - link

    I actually don't know. Here in Canada we're basically in the dark ages so no carriers have it.

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