Tutorial on how to update Mi4S (aqua) to MIUI9

How to flash MIUI9 Android 7 ROM on Xiaomi Mi4S

Here’s a short update for Xiaomi Mi4S owners. Below you’ll find the easiest method on how to upgrade your phone to the latest MIUI 9 (or Xiaomi.eu multi-lingual version) ROM.

Tutorial on how to update Mi4S (aqua) to MIUI9

So, let’s get started with Android 7 MIUI 9 ROM installation. You can download latest ROMs for Xiaomi Mi4S here.

  1. First of all, you must request official unlock permission from MIUI.
  2. Download MiFlash and install the official China ROM.
  3. Start your phone, enable developer options, USB debugging and OEM unlock (otherwise, MiUnlock won’t work). After you’ve enabled these options, MiUnlock will go further 50%.
  4. Now unlock the bootloader.
  5. Use fastboot and flash TWRP Custom Recovery for Android 7. Here’s a tutorial on how to flash TWRP on Mi4S. Download the recommended version below.
  6. Boot into TWRP, wipe partitions and make “data format”, reboot into recovery once again.
  7. Install MIUI 9 ROM and reboot into system.


MiUnlock: 2.3.803.10 | Download

MiFlash: MiFlashSetup20174250.msi

TWRP: twrp_Mi4s_7_greatslon.img