9.3.21 is a weekly (developer) MIUI weekly update for the Redmi Note 4 MTK (China, codename nikel), based on Android 6 and released on Mar 22, 2019.
- Device Redmi Note 4 MTK (
nikel) - Region China
- OS MIUI weekly, Android 6
- Branch Weekly (developer)
Download 9.3.21
| Type | Size | MD5 | |
|---|---|---|---|
| Recovery ROM (.zip, built-in updater) | 1.6 GB | — | Download |
| Fastboot ROM (.tgz, Mi Flash) | 1.8 GB | — | Download |
What’s New in 9.3.21
Xiaomi hasn’t published release notes for this build. Updates like this usually contain bug fixes, stability improvements and, if listed above, a new security patch.
How to Install This Update
Download the Recovery ROM, move it to the internal storage and choose Settings → About phone → (tap the OS card) → three dots → Choose update package. This keeps your data, but only works for a China phone on an older version. For a clean install or a region change, flash the Fastboot ROM with Mi Flash (unlocked bootloader required). Step-by-step instructions are on the Redmi Note 4 MTK firmware page.
Other Redmi Note 4 MTK China Versions
- Newer: V10.2.2.0.MBFCNXM (May 22, 2019)
- All Redmi Note 4 MTK firmware for every region
Build data: official Xiaomi servers. Firmware list tracked by XiaomiFirmwareUpdater.