The Stable update V12.5.6.0.RCTINXM has been officially released for Redmi 9 / 9 Activ (codename is cattail). 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 MIUI or HyperOS ROM, xiaomiROM.com do not own and never modified those firmwares,you will always download the file from Xiaomi server.
You may interest in those contents: Redmi 9 / 9 Activ ROM Topics Xiaomi Devices Index
Download Redmi 9 (cattail) India (IN) MIUI 12.5 V12.5.6.0.RCTINXM Recovery ROM with Android 11.0. Firmware size is 2.0 GB.
Download Redmi 9 (cattail) India (IN) MIUI 12.5 V12.5.6.0.RCTINXM Fastboot ROM with Android 11.0. Firmware size is 3.1 GB.