Unlock Hidden Features with Android Secret Codes

Most Android users are familiar with regular dialer numbers, but very few know that Android devices come with secret codes (also called USSD codes or MMI codes) that unlock hidden menus, diagnostic tools, and advanced settings.

These codes aren’t usually advertised by phone manufacturers, but they can help you:

• Run hardware tests (screen, speaker, vibration, camera, etc.)
• Check device information (IMEI, firmware, battery health, etc.)
• Access hidden system menus
• Troubleshoot issues with your phone

In this guide, we’ll cover the most useful Android secret codes, explain what they do, and highlight precautions you should take before using them.

🔑 What Are Android Secret Codes?

• USSD (Unstructured Supplementary Service Data): Codes that interact with your carrier network.
• MMI (Man-Machine Interface) Codes: Codes that interact with your phone’s hardware/software.

They are entered in the phone dialer just like dialing a phone number. For example:

*#06#

shows your IMEI number instantly.

⚠️ Warning: Some codes can reset your device or wipe data. Use them carefully.

📋 List of Useful Android Secret Codes

🔹 Device Information

• *#06# → Shows IMEI number(s)
• *#*#4636#*#* → Phone information, usage statistics, battery status
• *#*#1111#*#* → FTA software version
• *#*#1234#*#* → Firmware info

🔹 Hardware & Diagnostic Tests

• *#0*# → General hardware test menu (screen, touch, speaker, vibration, sensors, etc.)
• *#*#2664#*#* → Touchscreen test
• *#*#0842#*#* → Vibration and backlight test
• *#*#232331#*#* → Bluetooth test
• *#*#1472365#*#* → GPS test
• *#*#0289#*#* → Audio test

🔹 Battery & Network

• *#*#4636#*#* → Battery information (temperature, health, voltage)
• *#*#232338#*#* → Wi-Fi MAC address
• *#*#232339#*#* → Wi-Fi test
• *#*#7262626#*#* → Field test (network info, signal strength)

🔹 Backup, Reset & Debugging

⚠️ Use these with caution!

• *#*#7780#*#* → Factory reset (soft reset, keeps system apps)
• *2767*3855# → Hard reset (wipes everything, reinstalls firmware)
• *#9090# → Diagnostic configuration
• *#9900# → System dump mode

🔹 Call & Network Functions

• *#21# → Check call forwarding status
• *#62# → Check number where calls are forwarded
• ##002# → Disable all call forwarding
• *31# → Hide caller ID for outgoing calls

🛠️ Third-Party Tools to Explore Secret Codes

Some manufacturers (Samsung, Xiaomi, OnePlus) restrict certain codes. If dialing doesn’t work, you can use apps to access hidden menus:

• Secret Codes for Android (Google Play)
• Phone Info Samsung
• Device Info HW

These apps list all available codes for your device model.

⚠️ Safety Precautions

• Backup your data before trying reset codes.
• Some codes do not work on all devices.
• Misuse of engineering/debug menus may affect your phone’s stability.
• Carrier-specific codes may vary by country/operator.

🎯 Conclusion

Android secret codes are like hidden shortcuts for advanced users, technicians, and curious explorers. They allow you to test hardware, check system info, troubleshoot issues, and even reset your device without digging through multiple menus.

If used responsibly, these codes can save time and help you diagnose problems with your Android phone.