The Xiaomi Mi 4c runs on MIUI 7, which relies on Android 5.1.1 Lollipop core. Instead of refreshing the entire UI again, this time around Xiaomi focused on refining their launcher and improving its performance. According to Xiaomi's changelog, MIUI 7 is 30% faster and more responsive and 10% more energy efficient. It also adds a few new things as a baby album, child mode, new default themes and auto DND option.
As usual Xiaomi's customizations run very deep and replace everything including all Google services. In fact, the Mi phones sold in China don't have access to Google's services and those need to be sideloaded one way or the other (some resellers may even do that for you). The models sold officially on markets outside of China come with a preloaded Play Store app.
The lockscreen has a clock in the top left corner - gone are the lockscreen widgets. To unlock the phone you swipe upwards and if you want a quick access to the camera - just swipe from the right side.
Beyond the lockscreen is the Android homescreen with four customizable shortcuts docked at the bottom by default, but you can dock up to five items. You can have any app there or even folders with multiple items if you will.
There is no app drawer - anything you install pops up on your homescreen, which can have unlimited panes. There're no shortcuts and the usual routine of removing icons (dragging them up to a recycle bin at the top of the screen) will uninstall the corresponding app. There is a pop-up for confirming the action though, so you can't accidentally uninstall apps.
Homescreen widgets are available, too - tap and hold on the homescreen, then choose Widgets. There are few options available, but of course, you can get even more from the Play Store.
Homescreen effects are available and you can change themes, too. A theme will change your homescreen wallpaper, lockscreen style, system icons, system font and the sound profile (you can disable changing the sound profile from settings).
MIUI v.7 introduces five defaults themes - MIUI, High Life, Pink Blush, Rose and Ocean Breeze. They've been handpicked by the MIUI team and you can choose your interface look right from the start, but you can always download new themes from the Mi Store.
The notification area has two semi-transparent tabs - the first one hosts all notifications, while the second one (swipe left to access) offers customizable quick toggles and a Settings shortcut. Unfortunately, you can't directly bring the toggles page with two-finger swipe from the top as it is with other Android devices.
An enhanced task switcher with Clear All option is available, too.
By the way, Xiaomi's proprietary Search widget does a similar job as iOS's Spotlight system-wide search. You can fire it up by swiping up anywhere on the homescreen. The tool searches through your apps, music, email, settings, among others.
Xiaomi introduces the so-called Edge controls. Those are two gestures, which involve tapping on the frame of the device (its side) for certain actions. The first gesture is available system-wide - tap twice on the side of the Mi 4c and you'll go back as if you've tapped the capacitive Back key.
The second one applies only inside the camera - tap once for focus and a second time for taking a picture. While going Back with a double tap on the device itself is rather cool, doing so in the camera often results in blurry images if the light is less than favorable - each tap essentially shakes the whole device.
Xiaomi provides its own cloud service for content syncing between devices. Each Mi Cloud account is granted 5GB of free storage. You can use it to backup contacts, messages, your entire gallery, call log, notes, settings, voice recordings, Browser content (history, tabs, webapp data) and your music library.
Xiaomi's sync and backup service shares lots of similarities with the Apple iCloud. There is even a free Cloud Messaging option that allows you to exchange messages over the internet connection instead of being billed for SMS, but that only works between Xiaomi devices.
Finally, if you signed in with your Mi Cloud account, you can opt for the Find device function - a handy feature in case you misplace your Xiaomi Redmi Note 2 or someone steals it.
MIUI 7 has a new Child mode, which allows to run only apps of your choosing. This is nice if you have a kid, who likes playing with your phone occasionally and you are afraid it might delete some important data.
The Do Not Disturb mode has been enhanced too - it supports better customization and scheduling options.
We did get our review unit with pre-installed Google Play Store plus Google sync for app data, contacts, and browser data but perhaps they've been sideloaded by the reseller providing this review unit. Of course, you can sideload them yourself one way or the other if they don't come pre-installed on your unit. And once you have those, you can easily download all other Google apps such as Google Now straight from the Play Store.