Some units use 7890 followed by the current hour (e.g., 789014 for 2 PM).

, check the "Feature Settings" within the factory menu using the code CJ INDUSTRIES Are you trying to change a specific setting like the boot logo or fix a connection issue with your phone?

Be careful when changing values in the Factory Settings menu. Incorrectly configuring the Canbus or display settings can disable certain features or lead to a black screen.

Accessing the protected menus on a device is usually necessary for specific technical adjustments that aren't available in the standard Android settings: Unknown ums512 1h10 Natv | DeviceAtlas

If you can provide (e.g., on boot, in settings, on a PCB), I can give more specific advice.