Did you know that your Android smartphone has hidden secret codes that let you access diagnostic tools, check hardware status, and troubleshoot issues? These codes, also known as USSD (Unstructured Supplementary Service Data) or MMI (Man-Machine Interface) codes, provide quick access to hidden menus and advanced settings.
In this guide, we’ll explore the most useful Android secret codes for diagnostics and show you step-by-step how to use them. 🚀
🔹 What Are Android Secret Codes?
Android secret codes are special numeric or alphanumeric codes that you enter in the phone dialer to access hidden features. These codes are useful for:
✅ Testing phone hardware (display, sensors, touch, vibration, etc.)
✅ Checking battery health & usage 🔋
✅ Getting detailed phone info (IMEI, software version, etc.)
✅ Debugging network & connectivity issues 📶
✅ Resetting or unlocking hidden settings
🔹 Some codes work on all Android devices, while others are manufacturer-specific (Samsung, OnePlus, Xiaomi, etc.).
🔹 How to Use Android Secret Codes?
📌 Step 1: Open the Phone Dialer app.
📌 Step 2: Enter the secret code exactly as shown.
📌 Step 3: Press the Call button (if needed) or wait for the menu to appear.
📌 Step 4: Follow on-screen instructions to test features or access diagnostics.
⚠️ Note: Some codes may not work on certain devices or software versions due to manufacturer restrictions.
🔹 List of Most Useful Android Secret Codes
1️⃣ General Phone Information Codes
| Code | Function |
|---|---|
*#06# | Check IMEI number 📱 |
*#0*# | Access hardware test menu (Samsung) |
*#*#4636#*#* | Show phone, battery, and network info 🔋📶 |
*#*#7780#*#* | Perform factory reset (without data wipe) |
2️⃣ Display, Touch & Sensor Diagnostics
| Code | Function |
|---|---|
*#*#2664#*#* | Test touchscreen response 🖲️ |
*#*#232331#*#* | Test Bluetooth connection 📡 |
*#*#0588#*#* | Test proximity sensor (screen turns off when near face) |
*#*#1472365#*#* | Test GPS accuracy 📍 |
*#*#7262626#*#* | Enable Field Test Mode (Network details) 📶 |
3️⃣ Battery & Charging Tests
| Code | Function |
|---|---|
*#0228# | Show battery status & health 🔋 (Samsung) |
*#*#0288#*#* | Battery charge test |
*#*#273283*255*663282*#*#* | Open file backup menu (Samsung) |
4️⃣ Network, Wi-Fi & Bluetooth Diagnostics
| Code | Function |
|---|---|
*#*#232339#*#* | Test Wi-Fi signal & strength 📶 |
*#*#197328640#*#* | Open Service Mode for network debugging |
*#*#4636#*#* | Show detailed network information |
*#*#1111#*#* | Show software version (Samsung) |
5️⃣ Reset & Debugging Codes
| Code | Function |
|---|---|
*#*#7780#*#* | Soft reset (factory reset without deleting data) |
*2767*3855# | Hard reset (wipes all data, use with caution!) |
*#*#7594#*#* | Change power button behavior |
*#7465625# | Check SIM lock status |
🔹 Manufacturer-Specific Secret Codes
Some brands have their own custom secret codes:
🔹 Samsung:
*#0*#→ Hardware Test Menu*#0228#→ Battery Status Check*#2683662#→ Service Mode
🔹 Xiaomi:
*#*#6484#*#*→ Hardware Test*#*#4636#*#*→ Network & Battery Info
🔹 OnePlus:
*#808#→ Engineering Mode*#800#→ OnePlus Diagnostic Tool
🔹 How to Use Secret Codes for Android Diagnostics (Step-by-Step)
✅ Step 1: Check Hardware Components
1️⃣ Open Phone Dialer
2️⃣ Enter *#0*# (for Samsung) or *#*#4636#*#* (for most Androids)
3️⃣ Select “Sensor Test” to check accelerometer, gyroscope, and touch response
4️⃣ Follow on-screen instructions for each test
✅ Step 2: Test Battery Health
1️⃣ Dial *#0228# (Samsung) or *#*#4636#*#*
2️⃣ Check battery voltage, temperature, and health status
3️⃣ If voltage is too low, consider replacing the battery
✅ Step 3: Fix Network & Wi-Fi Issues
1️⃣ Dial *#*#232339#*#* to test Wi-Fi signal strength
2️⃣ Use *#*#4636#*#* to switch between different network modes
3️⃣ Restart the device after changes
🔹 Troubleshooting & Warnings
🚨 Some codes may not work on all devices due to manufacturer restrictions.
🚨 Using reset codes (*2767*3855#) will delete all data, so use with caution.
🚨 Some codes require carrier permissions, especially SIM unlock codes.
If a code doesn’t work, try updating your software or use a third-party diagnostic app like Device Info HW or Phone Doctor Plus.
🔹 Final Thoughts: Unlock Hidden Android Features
Android secret codes are powerful tools that help you diagnose, troubleshoot, and optimize your phone. Whether you need to test hardware, check network status, or reset settings, these codes give you quick access to essential features.
💡 Try them out and share your experience! Which secret code did you find most useful? Let us know in the comments! 🚀📱
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