Redmi A3x uses the internal codename klein and is the Android 16/15 entry in Xiaomi’s budget A‑series, with official fastboot ROMs now available for Global, India and Russia.
Typical entry‑level user reports on HyperOS include lag when storage is near full or with many background apps, plus battery drain on certain builds; Xiaomi also notes devices can lag when battery is very low.
The three official fastboot packages below let you clean‑flash to fix bootloops, recover failed OTAs, and move to stable Android 16 (WGSMIXM/WGSRUXM) or Android 15 (VGSINXM) releases for Redmi A3x.
Redmi A3x Firmware Details
| Device name | Redmi A3x |
|---|---|
| Codename | klein |
| Model identifiers | 24048RN6CG (Global), 24048RN6CI (India) listed for Redmi A3x. |
| Chipset | Entry‑level Unisoc T603 class platform (vendor listings). |
| Android versions | Android 16 (V816.0.1.0 WGSMIXM/WGSRUXM), Android 15 (V816.0.8.0 VGSINXM). |
| Fastboot package type | Official.tgz factory images with full partitions and flash scripts. |
| Flashing tool | Xiaomi Mi Flash Tool or fastboot CLI on Windows PC. |
| Bootloader | Unlock required for fastboot ROMs; recovery/OTA ZIPs are for locked devices. |
| Common complaints | Lag with many background apps or low battery, and battery drain reports on some HyperOS builds. |
Download Official Firmware for Redmi A3x (klein)
These are signed HyperOS factory images from Xiaomi’s bigota server for Global (Android 16), India (Android 15) and Russia (Android 16). Use them to unbrick, fix failed OTAs or perform a clean upgrade.
| Filename | File size | Build date | Build / Android | Region / type | Download |
|---|---|---|---|---|---|
| klein_global_images_V816.0.1.0.WGSMIXM_20251105.0000.00_16.0_global_a4553a94bb.tgz | 4.52 GB | 2025‑11‑05 | V816.0.1.0.WGSMIXM · Android 16 | Global (MI) · fastboot ROM for Redmi A3x | Download Global (Xiaomi bigota) |
| klein_in_global_images_V816.0.8.0.VGSINXM_20251020.0000.00_15.0_in_580cba02c0.tgz | 3.43 GB | 2025‑10‑20 | V816.0.8.0.VGSINXM · Android 15 | India (IN) · fastboot ROM for Redmi A3x | Download India (Xiaomi bigota) |
| klein_ru_global_images_V816.0.1.0.WGSRUXM_20251119.0000.00_16.0_ru_935ee71fe6.tgz | 4.31 GB | 2025‑11‑19 | V816.0.1.0.WGSRUXM · Android 16 | Russia (RU) · fastboot ROM for Redmi A3x | Download Russia (Xiaomi bigota) |
Flashing Requirements
- Verify codename: In fastboot, run fastboot getvar product; proceed only if it returns klein.
- Unlock bootloader: Xiaomi fastboot ROMs require an unlocked bootloader.
- PC and tools: Windows PC, Xiaomi USB drivers, Mi Flash Tool or fastboot CLI, reliable USB‑C cable, 10–15 GB free space.
- Battery and data: Charge above 60% and back up data; “clean all” flashes erase internal storage.
- Match region: Use WGSMIXM (Global), VGSINXM (India) or WGSRUXM (Russia) for correct languages/OTAs.
How to Flash the Firmware
Fastboot ROMs (.tgz) with Mi Flash
- Download the correct klein_…_images_… file and extract it until the images folder and flash_all*.bat scripts appear.
- Install Xiaomi Mi Flash Tool and drivers, open Mi Flash and select the extracted firmware folder.
- Boot Redmi A3x into fastboot mode, connect via USB and click “Refresh” to confirm detection.
- Select clean all, click “Flash” and wait for success without disconnecting the cable.
- Reboot; first boot may take several minutes while Android optimizes apps and stabilizes.
Need visuals? Follow these step‑by‑step guides with screenshots: flash with Xiaomi Mi Flash Tool, use a flash_all.bat fastboot script, and install OTAs via recovery/ADB sideload.
Frequently Asked Questions (FAQs)
What problems can these klein ROMs fix?
Clean fastboot images can revive devices stuck on the logo, repair failed OTA updates and clear deep software glitches by reinstalling a fresh Android 16/15 build.
Why does the phone feel laggy sometimes?
Lag often appears when many apps run in the background, storage is low or battery is very low; Xiaomi documents throttling at critical battery levels causing slowdowns.
Which file should I choose?
Match your region code: WGSMIXM for Global, VGSINXM for India and WGSRUXM for Russia; cross‑region flashing can affect languages and OTA behavior.
How do I confirm my device is klein?
Boot to fastboot and run fastboot getvar product; Redmi A3x units for these ROMs report klein per official trackers and certification posts.
