The update is based on Android 10 and rolling out to users with firmware version V12.0.7.0.QJCCNXM. As this is just a security patch update, you won’t experience any new changes. But, internally the security has been upgraded.  If you’re a user of Redmi 9 in China and haven’t received the update yet, then check it manually by navigating to Settings » About phone » System update. Alternatively, we’ve added a download link for the latest package. It requires manual installation which we don’t recommend.  Device: Redmi 9 Version: V12.0.7.0.QJCCNXM Region: China Android: 10 Download Link: Full ROM Changelog: [System] Updated Android Security Patch to February 2021. Increased system security.

Redmi 9 getting February 2021 security patch update   Rootmygalaxy net - 22