The Samsung E1200, also known as the Keystone 2, is a classic "feature phone" prized for its simplicity and long battery life. While it lacks a modern operating system, it contains several hidden "backdoor" codes used by technicians to troubleshoot the device. How to Enter the Codes You do not need to navigate to a special menu to use these. Ensure you are on the home screen. Open the keypad.
Enter *#0*# → Test speaker, vibrator, keys, and LCD. How to Use Secret Codes on SAMSUNG E1200
| Code | Function | |------|----------| | *#9090# | Diagnostic USB/Serial configuration (for PC connection) | | *#7284# | USB Mode Switch (MTP vs. Modem vs. PDA) | | *#9900# | System Dump Mode (low-level debug – not user-friendly) | The Samsung E1200, also known as the Keystone
If you type a code and nothing happens:
— Shows the exact date and time your next alarm is scheduled to ring. Troubleshooting Tips Ensure you are on the home screen