Look for a tiny pinhole on the front panel, usually near the volume knob or at the bottom corner. Use a Tool: Gently insert a paperclip or SIM ejector tool.
Note: Use extreme caution in these menus. Changing the wrong voltage or frequency setting can permanently brick the device. Troubleshooting Persistent Issues
Before attempting a hard reset via a code, try the built-in software reset. This is the safest way to clear your user data and Bluetooth pairings without risking system corruption. Power on the unit. Go to the Settings menu. Select the System tab. Scroll down to Factory Reset. Confirm your choice to wipe all data. Common Default Passcodes