This is for advanced user only.

For UNLOCKED BOOTLOADER ONLY

Quote: fastboot flash system system.img

Quote: fastboot flash boot boot.img

TWRP link :

ROM Link :

How to unlock the bootloader tutorial :

Root not included but Google services yes. This is a stock ROM, with 50 langages included.If you don't know what are adb command, root, TWRP, don't follow this guide.Don't blame me if you brick your phone, kill your cat or burn your house.To install the rom, extact the system.img and boot.img from the rar/zip in the same folder than adb.exe and fastboot.exe.Then, reboot your phone in fastboot mode with volume down+power.Plug in to your PC, open and cmd prompt (maintain left shift on the keyboard, right click in the adb/img folder with the mouse and select open cmd prompt here) and write :Wait 15min.....then:Flash TWRP with fastboot....(fastboot flash recovery recoveryfilename.img)Make a data/cache wipe in TWRP recoveryWhen it's done, press power for ~10sec to reboot your phone.Wait.....(15-30min)Set up the phone in English, and don't set your Google account immediately.Once the setup wizard is done,Do whatever you want.You can also try to flash the ROM with MiFlash. I didn't tried but it should work, and will be more easier for new users.If you wanna install root :Flash SuperSU (last version) in TWRP.If you can't access your sdcard, wipe the internal storage (sdcard), reboot to TWRP and wipe it again. Then, reboot... Wait... Setup your phone again. Reboot to TWRP and flash SuperSU.Your phone got now decrypted data partition to allow TWRP flashing files.drive.google.com/folderview?id=0B1JX0MSsEt63d0dZeDBCWkF0Q28&usp=sha ringdropbox.com/s/mqtb82dwq9n0a2i/xiaomi_mi5_multilanguage_rom_xiaomiphone_com.rarforum.xda-developers.com/mi-5/how-to/unlocking-xiaomi-mi-5-bootloader-t3336243Done