Android and Samsung Secret Codes USSD MMI Code List

Android phones and Samsung devices come with hidden menus and diagnostic tools that aren't visible in regular settings. These secret codes, known as USSD (Unstructured Supplementary Service Data) and MMI (Man-Machine Interface) codes, give you direct access to system information, testing features, and troubleshooting options.

These codes were originally designed for developers and technicians, but you can use them to diagnose problems or access hidden features. Just be careful - some codes can reset settings or erase data, so always research what a code does before using it.

Essential Phone Information Codes

These codes reveal important details about your device's hardware and software:

#06# - Display your phone's IMEI number
*##4636##** - View phone information, usage statistics, and Wi-Fi details
*##49862650468##*** - Check PDA, hardware, and firmware information
*##1234##** - View PDA type and version (Samsung)
*##1111##** - Display firmware software version
*##2222##** - Show firmware hardware version
*##44336##** - Display build version, sales code, and change list
*#12580369#** - Check software and hardware information

Diagnostic and Testing Codes

Use these codes to test various hardware components and troubleshoot issues:

*#0#** - General test mode for Samsung devices
*##0842##** - Test vibration and backlight
*##2664##** - Touch screen test
*##232331##** - Bluetooth test
*##1472365##** - GPS test
*##526##** - WLAN network test
#0588# - Proximity sensor test
#0589# - Light sensor test
#0673# - Audio and melody test
#0782# - Real-time clock test
#0842# - Vibration motor test

System Control and Settings

These codes give you access to system-level controls and settings:

#7284# - USB I2C mode control panel
#872564# - USB logging control
#4238378# - GCF configuration control
#0283# - Audio loopback control
#1575# - GPS menu management
#9900# - System dump mode for diagnostics
#7594# - Remap shutdown to end call
#746# - Debug dump menu

Network and Service Codes

Access network information and service settings with these codes:

#0011# - Show GSM network status information
#2263# - RF band selection for network mode
*#272IMEI#** - Change sales codes and reset user data
*#7465625638#* - Customize network lock MCC/MNC
#32489# - Enter service mode (ciphering info)
#197328640# - Default service mode
#0808# - USB service mode

Factory Reset and Data Management

Warning: These codes can erase your data. Use with extreme caution.

#7780# - Factory reset with confirmation message
*#27673855#** - Full factory reset without confirmation (hard reset)
*##273283255663282##*** - Backup media files

How to Use Secret Codes Safely

1.Open your phone app and go to the dial pad
2.Enter the code exactly as shown - most codes will execute automatically
3.Research first - always check what a code does before using it
4.Backup your data before using any reset or system modification codes
5.Start with information codes before trying system modification codes

If a code doesn't work, it might be specific to certain models or Android versions. Some codes are carrier-specific or may have been disabled in newer Android updates.

Remember that while these codes can help troubleshoot issues and access hidden features, they should be used responsibly. Stick to information and testing codes unless you're comfortable with the potential consequences of system modification codes.