You are trying to flash an older firmware version than what is currently installed. Xiaomi prevents downgrading to older security patches. Solution: Download a newer firmware version (same Android version or higher). You cannot downgrade from Android 11 to Android 10 without a deep engineering cable.
Xiaomi released several hardware variants of the REDMI 9C. You must pick the exact firmware: Firmware REDMI 9C
Whether you are stuck in a boot loop, want to manually update to the latest MIUI version, or need to unbrick your device, understanding is essential. In this guide, we will break down what firmware is, where to find official versions, how to flash them safely, and how to troubleshoot common errors. You are trying to flash an older firmware
This is the full, official firmware package released by Xiaomi. It comes in a .tgz format and must be flashed using a PC tool called while the phone is in Fastboot mode. You cannot downgrade from Android 11 to Android
Note: Installing these requires unlocking the bootloader and using a custom recovery like TWRP. Xiaomi Redmi 9C - Software update - Gomibo.ch