Tech aficionados and hackers alike should swarm to buy this fun-to-hack phone.

What is a Mi Phone? A review of the Xiaomi Mi Mix 2S

I often get asked “what phone do you use?” For me, the question isn’t all that straightforward to answer. For the last few years I have stayed away from the popular iPhone or Samsung handsets and instead used a variety of unusual Android phones. I have mostly seeked out models that support features that allow me to modify their hardware or software. Currently I use a Xiaomi Mi Mix 2s—a phone manufactured by Chinese tech giant Xiaomi—that was the flagship model in their “Mi Phone” (pronounced me phone) lineup. The phone features a design that takes clear

The Mi Mix 2S’ camera assembly is particularly derivative of the iPhone X (image credit Xiaomi [])
inspiration from the iPhone X and is, like all Mi Phones, unavailable for purchase in the U.S. I purchased my Mi Mix 2s second hand, and had it imported from Europe. I have no way to know if the original owner imported it directly from China with a service like AliExpress or found it for sale in Europe, where it is generally easier to buy Chinese phones. Either way these phones are not commonly used by U.S. customers. 

Part 1: WHY!?

So why would I seek out this strange ‘Mi Phone’ instead of settling for an iPhone, or a common Android, which I have owned previous models various times? 

The iPhone X (image credit Apple [])
The answer comes down to my desire to find a high performance, affordable, modern smartphone that also has good support for custom operating systems or ROMS such as Lineage OS. The LG G5 checks most of these boxes, it has decent performance, super affordable (costing around $100) and has many modern features such as dual camera, a fast fingerprint sensor, and USB type C. Unfortunately the LG G5 never saw an official update past Android 8.1, and most models have no support for bootloader unlocking.

The Nexus 6P seems to solve many of these problems, still supporting the most important modern features (a fingerprint sensor and USB Type C) as well as having really good support for lineage OS. However it’s camera is sub par, and the phone was large and slow, with battery life that was just as bad as the LG G5 without the option to quickly and easily change the battery when you need more power.

The LG G5 was also the last high end phone to have a removable battery, a feature that I miss (image credit LG [])
So after much research I finally decided that I would get a Xiaomi Mi Phone. Mi Phones are generally cheaper than similarly featured phones intended for the US market in addition to having support for bootloader unlocking across the board. However I couldn’t pick any Xiaomi Phone: China uses different cellular bands (which are kind of like radio frequencies) than we do, so since the phones were not intended for the US market, many are incapable of tuning into the bands required by Verizon.   The Mi Mix series is one of the few models to officially support those bands, even if some people had claimed to be able to manually enable support for extra bands on other models.

Still, even after I had narrowed my search down to the Mi Mix series, I still had four options: the Mi Mix 1, 2, 2S, and 3.The Mi Mix 1 was the original Mi Mix phone, and had been out of production for a year or two, with very few available on the used market, even fewer at fair prices. The Mi Mix 2 looked more promising, as it had just exited production and overstock units were being cleared out for prices that were the same or less than used Mi Mix 1’s. The Mi Mix 2S

My Mi Mix 2S

was a slightly upgraded version of the Mi Mix 2, with dual cameras and a marginally faster CPU; it had also just exited production, and seemed a plausible choice as well. The Mi Mix 3 was newly released and much too expensive.  In the end the choice was basically made for me, when someone listed their very l ightly used Mi Mix 2S for $200 which was less than a new Mi Mix 2. In this case the risk of buying used vs new were very similar: I was never going to get warranty support; even if I wasn’t going to risk voiding my warranty by unlocking the bootloader, Xiaomi has no obligation to provide support for imported devices. 

Part two: The phone arrives! 

I have had my Mi Mix 2S for almost a year now. It arrived in late August 2019, a week or two after I had ordered it. The phone came in an overly large box

that featured a quote from Xiaomi founder Lei Jun printed in golden lettering on a piece of thick card stock. The phone also came with a European USB wall adapter: a manual, which features the same quote, in case you missed it the first time; and three cases, all of which are terrible quality: in fact a full year later I have yet to find a Mi Phone case that I feel confident in, another trade-off to importing a weird smartphone.

Despite the low quality cases, the phone itself feels solid. In fact it might be the best built Android smartphone I have ever used: the phone has a satisfying heft thanks to the ceramic back and large battery, which, alongside the metal sides, does  a great job of assuring that the phone is extremely rigid (No bendgate here, Apple!) The iPhone inspired design looks sleek and modern, and I love that Xiaomi managed not to include a notch (Take notes Apple!) while still keeping the bezels small (even if it means that the selfie camera is poorly positioned in the bottom right…)


So the first thing I did when I powered my Mi Mix 2s was to boot it into Fastboot mode and attempt to unlock the bootloader. Booting it into Fastboot was super straightforward, all I had to do was

I still have no idea why they designed this splash screen

hold power and volume down, and I was greeted with the image of a Soviet rabbit mechanic fixing a broken Android… a bit of an odd choice for a Fastboot splash screen… Then I plugged the phone into my laptop using a USB type C cable and ran Xiaomi’s custom tool. Their tool required me to make a free Mi developer account and notified me that it would record the serial number of my phone, making me ineligible for warranty support. Parts of this tool, (and of the Mi developer website that I downloaded the tool from and created my account on) were in Chinese, but Google Translate came to the rescue when

The page to create Mi Developer account is not available in English

required. Unfortunately,  I ran into an issue that was more than just a language barrier: I was notified by the tool that my attempt to unlock the bootloader had failed because I “was required to use MiUi for 72 hours.” Apparently, this was an attempt by Xiaomi to stop importers from loading custom firmware on their phones without the consent of the customers. But whether or not that was the real reason, there was no way around it other than to use the phone with MiUI for 3 days (fortunately it counts the time that you have your phone in sleep mode as long as you interact with the phone enough during the day…)  so I reluctantly booted the phone into MiUI and started the set up process.



But the home page for the bootloader unlock site is…

Part 3: 3 Days with MiUI

MiUI is Xiaomi’s custom version of Android, similar to how Samsung has One UI (aka Touchwiz) or LG has G UX. MiUI, much like the hardware, takes clear inspiration from Apple, it is a perfectly usable OS. It has a lot of built in apps, such as a weather app and a calculator, that are really nice to use (and super similar to their iOS counterparts). Additionally, MiUI gets surprising fast updates for how modified it is compared to the standard version of Android that Google releases as part of AOSP (Android Open Source Project). However I could hardly wait to install Lineage OS. I despise heavily modified versions of Android: they hurt the usability and aesthetics, and they always end up sending your data to someone besides Google, who

While MiUI takes some clear ques from Apple it is, much like the Mi Mix 2s,  not a clone. 9 (image credit Xiaomi [])
already has access no matter the version of Android because of Google Play Services. With the LG G5 it was Verizon though programs such as AppFlash, and with MiUI it was Xiaomi. Contrary to some xenophobic claims Xiaomi is not owned by the Chinese government and has actually done a good job distancing itself from China, setting up servers outside of the country for international customers. They are, however, pretty transparent about the fact that they collect a lot of your data, to a point that many consider it excessive. While I am no privacy freak, I do like to limit who can access my data and seeing. Since I already  find Lineage OS to be more usable than most custom versions of Android, the fact that it has better privacy controls is just a bonus.

Part 4: Lineage 

Lineage OS is the most popular and well supported “custom ROM.” A custom ROM is a version of Android that is supported by the community instead of by the device manufacturer, the main advantage to this is that it can enable features that are not supported by the stock ROM, such as root, as well as allowing you to update your phones to newer versions of Android than the manufacturer officially supports. Lineage is fairly faithful to Google’s AOSP with a few small tweaks that are designed to give the user more flexibility in how they want to use their phone. Lineage is actually a fairly recent project: It officially began in 2016, but its lineage (pun intended, both by me and the people who named Lineage) goes back to the earliest days of Android modding. Cyanogenmod started back in 2008, by Stefanie Kondik, a software engineer at Samsung, and was based primarily on AOSP, with any modifications being written by either

Lineage OS looks almost identical to AOSP (image credit XDA [])
the Cyanogen Team (which later became the Cyanogen Corporation) or community members on the XDA forum (A forum that is dedicated to modding Android phones, and a very helpful resource to anyone looking to install Lineage OS)

Cyanogen’s downfall started in 2013 when Kondik obtained funding to form Cyanogen Inc. to create a commercial version of the popular ROM, however this ended in disaster. With Cyanogen Inc. never finding a viable way to capitalize on the success of their project, Kindik left the company in 2016, and a few months later the company itself failed. The XDA members who had contributed to the project, as well as some former employees officially formed Lineage OS on December 24th 2016 to continue where Cyanogen had left off.

With all that out of the way, it should come as no surprise that once I got the bootloader unlocked, the actual installation of such a well established ROM went super smoothly. I unlocked the bootloader with Xiaomi’s tool, and then moved to Fastboot, a command line tool made by Google to help flash Android phones. I entered a few commands to flash TWRP, which is a custom recovery that will enable me to load Lineage OS (on Android the recovery is a little bit like a BIOS on a PC, but it is also like an installer

The main screen in TWRP allows you to install ROMs, Wipe the phones storage completely, clone the NAND to an image file, and more (image credit XDA [])
program). I then rebooted to TWRP, which let me wipe the OS partition on the system NAND and flash Lineage OS, OpenGapps (which provides the previously mentioned Google Play Services, which besides being a convenient way for Google to spy on you also allows the App Store to work) and Magisk (which gives me root access, or access at a higher privilege level than the user sandbox that a typical Android user is isolated to)

After flashing I rebooted the phone and set it up just like I would any other Android phone. Unlike most Android phones that come with tons of preinstalled applications, Lineage OS comes with only the bare minimum, allowing you to choose which applications you prefer. After I signed in with my Google account all of my applications from my last cloud backup started installing and my Mi Mix 2s was finally ready to go.

Part 5: One year later

One year later I can still confidently recommend the Mi Mix 2S. It is not a phone for everyone, but that doesn’t mean it is not an amazing phone. It is a solidly engineered piece of hardware that gives the user impressive flexibility in terms of software, while being affordably priced. It is by far the best phone I have ever owned, with no major deficiency if I am willing to ignore the lack of a headphone jack, which is frustratingly common these days. I would love to see Xiaomi produce more phones that work with US carriers while continuing to offer unrivaled pricing and flexibility.


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