How to flash custom ROM and root Redmi 3S In C:\adb folder find and open flash_twrp.bat file. The same folder with ADB / fastboot tools.
Download Platform-tools (adb / fastboot) and unpack the files into C:\adb or similar folder.How to check bootloader lock status on Redmi 3S / 3X
Now press “Reboot phone” and wait until your device is rebooted.
Unlock Bootloader on Redmi 3S / 3X with MiUnlock Here’s a tutorial on how to unlock bootloader on Redmi 3S with official MIUI permission. Advertisement Complete Guide on how to flash Custom ROM on Xiaomi Redmi 3Sīefore flashing any custom ROM on your device you must unlock bootloader on your device.