) was updated to version 1.20_231222, including performance improvements for app detection and new intents for managing home screen apps. : Improved handling of system locales and boot-up events. How to Perform the Update
Recent iterations (specifically v4.2.9 and later) have focused on maintaining feature parity with newer Android 13 (M600/M700) units:
Official updates are usually shared through community hubs rather than a central manufacturer site. The most reliable sources for firmware include:
| Issue | Solution (Top-down approach) | | :--- | :--- | | | Check MCU settings > "Amplifier IC" type (TDA7850 vs TDA7388). Reboot twice. | | Touch screen reversed (X/Y axis) | Flash a specific kswquserdebug driver pack. Look for "GT911" or "FT5x06" in update changelog. | | Boot loop | Enter recovery (Method B), wipe data/factory reset. This resolves 90% of userdebug boot loops. | | Wi-Fi shows "error" | Downgrade the MCU firmware first, then re-flash OS update. Sequence matters. |
