If your device runs a newer version of Android, these codes may simply do nothing or show a "Connection problem or invalid MMI code" error. If this happens, revert to Method 1 .
| Problem | Solution | "Code" | | :--- | :--- | :--- | | Frozen Screen / No Sound | Pin-hole reset | | | Forgotten Bluetooth Pairing | Pin-hole reset | Paperclip for 5 seconds | | Forgotten Parental Lock PIN | Full power drain | Battery removal for 1 hour | | Won't turn on | Capacitor discharge | Hold Power for 30 sec (unplugged) | grundig gx3800 factory reset code better
This cuts the power momentarily to the processor. You have just performed a "soft" factory reset. All temporary memory (including Bluetooth pairings) is cleared. If your device runs a newer version of
The way is physical.