Recommendation: If security patches and app compatibility matter, install MIUI 12.5 (Google mobile OS 11) when an official OTA appears. Verify availability via Settings > About phone > System update and perform a full backup before applying any update.
To confirm current software state, open Settings > About phone and read MIUI build string plus security patch date. If build shows 2020 or early-2021 patch level, prioritize update or download incremental OTA from Xiaomi support pages for a safer install.
Advanced option: Community-maintained releases such as LineageOS can offer later Google mobile OS iterations (11 or 12) for select Xiaomi 9 variants. Bootloader unlock and custom recovery installation are required; expect data loss and warranty voiding. Follow device-specific forum threads for compatible builds, required kernel patches, and step-by-step flashing guides.
Support summary: one major official OS upgrade (10→11) plus limited security updates is typical for this budget-class model. For longer-term platform support, choose a maintained custom release or upgrade to a newer handset with multi-year update commitments.
Factory Android Version on Redmi 9
Shipped with MIUI 11 built on v10 (API 29). Recommended action: install official OTA before adding accounts or unlocking bootloader.
- Confirm factory firmware: open Settings > About phone > MIUI build, Base OS and Security patch; note build number for support queries.
- Verify retail box sticker and IMEI label for stated MIUI release and base OS numeral; match those values with device About screen prior to manual flashing.
- Check bootloader state via fastboot (power + volume down). Bootloader status determines whether fastboot ROM or recovery ROM is required for restoration.
- Use ADB for quick inspection (device must be authorized): run adb devices then adb shell getprop | grep -i “release\|security” to reveal base release and patch date.
- Restore stock firmware using official fastboot package with Mi Flash in clean-all mode; unlock bootloader first via official Mi Unlock. Flashing will erase user data – backup beforehand.
- If bootloader remains locked, apply official recovery (local) update: move official recovery package to device storage and use Updater app’s “Choose update package” option to install without unlocking.
- Always flash only packages that exactly match model code and region. If you adored this write-up and you would certainly like to receive more facts concerning 1xbet apk kindly see our webpage. Mismatched fastboot ROMs can brick device.
- When warranty retention is required, prefer OTA or recovery local update instead of unlocking or third-party builds.
Check Security patch date in About phone and keep it current; when official major update appears for specific model, prefer OTA or official fastboot package from vendor servers.
Original Android base at launch
Use stock AOSP 10 (API level 29) build shipped on this handset for uninterrupted official OTA support; install MIUI 12.0.1 or 12.0.2 update and initial security patch (June 2020) before unlocking bootloader.
Launch base details: AOSP 10 (API 29) core, MIUI 12 skin, vendor kernel compiled from Linux 4.19 sources (some regional ROMs used 4.14). Partition map: boot, recovery, system, vendor, userdata, odm, product, vbmeta, persist. Firmware filenames in stock ROM packages typically include: payload.bin, system.img, boot.img, recovery.img, vbmeta.img.
Recommended maintenance steps: keep stock OTA until full backup created; unlock via official bootloader unlock tool, obtain latest fastboot and SP Flash Tool builds; use TWRP image matching kernel and chipset before flashing custom builds. For flashing via fastboot, preserve vbmeta unless flashing signed images; if disabling dm-verity and verity verification required, pass appropriate fastboot flags and flash vbmeta with –disable-verity –disable-verification.
Upgrade options: official MIUI 12.5 and MIUI 13 OTAs (where released) provide incremental UI refinements atop original AOSP 10 base; community ROMs based on AOSP 11 (API 30) or AOSP 12 (API 31) exist for Helio G80 chipset – choose builds with active maintainers, recent security patch levels, and verified boot compatibility. Always verify device codename, bootloader status, and compatibility with vendor blobs before flashing.
Security note: initial security patch date: 2020-06. For long-term patching, rely on maintained custom projects and verify cryptographic signatures of downloaded images. Keep backups of EFS/NVRAM-like partitions where present.
