The Xiaomi Mi A1 has been announced under the Android One program which will guarantee you updates before all others. It uses a pure version of Android and not MIUI like other Chinese smartphones. However, now thanks to the work of the developer "GLokin666" from the XDA community you will be able to use Mi A1 system firmware on Xiaomi Redmi Note 4.
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As the blog also advances TechDroider, all important aspects of the Xiaomi Redmi Note 4 are working except the fingerprint reader or biometric reader and the VoLTE connection.
Mi A1 Android One on the Xiaomi Redmi Note 4
Note that Xiaomi Mi A1 uses the same A / B system as Google Pixel and A / B system means that when a device receives an update it will be downloaded and installed on the second system partition and when the user reboots the system. smartphone this second partition will become System A instead of B so that the upgrade process will take place smoothly.
Note that to install Mi A1 firmware on your Xiaomi Redmi Note 4 you will need to unlock your device's Bootloader and of course install a TWRP Custom Recovery to later install Android One-based firmware (system software) for your your Xiaomi Redmi Note 4.
This firmware is based on Android 7.1.2 Nougat and Google will update the Mi A1 very soon with their Android Oreo 8.0 so expect a new portability as well. port for this Redmi Note 4.