Here’s a some information on how you can flash an Official MIUI ROM on your Xiaomi Mi5S Plus smartphone. The thing is that many devices are being sold with “Vietnamese” or other unofficial ROM version installed, while most users like to have Official MIUI ROM installed.
How to install Official China Stable ROM on Xiaomi Mi5S Plus
So, let’s imagine that you’ve finally get your Xiaomi Mi5S Plus device in your hands and now you want to flash Official MIUI ROM on it. Here’s what you need to do.
First of all, you need to download Official ROM (recovery) and install it via “Updater” app (three dots icon). Also you can flash Official China Stable ROM using the MiFlash tool.
It’s recommended to download ROM using the phone browser, to avoid broken files. In case you’ve flashing using the MiFlash tool, then download and install all required PC drivers.
Another thing you should know is that after flashing from unofficial to MIUI China Stable ROM all your personal data will be deleted, so make sure you’ve made a backup.
In case you want to install multilingual or Custom ROM on device, you must first unlock bootloader on your phone. Then flash TWRP Custom Recovery and then install any ROM you want.