Download Mi 10 Ultra (cas) 21.9.15 MIUI 12.5 Closed Beta / Nightly Full Rom
17 September 2021
The Closed Beta / Nightly update 21.9.15 has been officially released for Mi 10 Ultra (codename is cas). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing fastboot getvar product in cmd/shell.
The firmware files posted here are all official Xiaomi ROM, xiaomiROM.com do not own and never modified those firmwares，you will always download the file from Xiaomi server.