We all know that MIUI (Mi User Interface) is developed by Chinese smartphone maker, Xiaomi for its smartphones. MIUI is based on Google Android operating system and latest MIUI version is 9 which is based on Android Nougat OS. Xiaomi officially announced MIUI 9 on 26 July 2017 and beta ROM is available for selected Xiaomi devices as of now. But surprisingly, MIUI 9 spotted running on OnePlus 3T smartphone only after few days of announcement.
MIUI 9 for OnePlus 3T is released by unknown Chinese developer. The whole sequence is possible because of open source nature of Android operating system. The Chinese developer definitely found a way to alter MIUI 9 so that it can run on OnePlus 3T. The screenshot reveals MIUI 9 7.7.31 running on OnePlus 3T. You can check below screenshots which clearly indicates OnePlus 3T running on MIUI 9.
The whole thing is unofficial. The ROM also has several bugs for OnePlus 3T. So if you are planning to try MIUI 9 on your OnePlus 3T we will recommend you to proceed with cautions.
OnePlus launched OnePlus 3T last year with Oxygen OS based on Android 6.0.1 Marshmallow OS and recently they updated Oxygen OS on OnePlus 3T. Right now, official Oxygen OS is very stable for OnePlus 3T.