Secret codes for Android phones

This guide will introduce you to the hidden settings intended for manufacturers, mobile phone operators or developers, new ways to tweak Android, and tools to troubleshoot your device.

How to access secret codes for Android devices?

Below is a list of the popular secret codes for Android (2021). Open the Phone app and dial the desired code as you'll normally do for a regular phone number. Some of these codes are intended for specific smartphone models or versions of Android. If you type a code and nothing happens, you should simply skip it. 

Find information about your device

You can use the following codes to retrieve information about your system (hardware and software):

*#06# - Display the IMEI.
*#*#4636#*#* - Display information about your phone, its battery and additional usage statistics.
*#232337# - Display the MAC address of your Bluetooth radio.
*#232338# - Display the MAC address of your WLAN adapter.
*#*#8255 #*#* - Display the GTalk service.
*#7465625# - Check the status of the network lock and/or SIMLOCK .
*#*#4636#*#* - Display general information about your device.
*#34971539# - Display information about your camera sensor.
*#2663# - Display information about your screen.
*#1234# - Display the firmware version.

Troubleshoot your hardware components

You can use the following codes to run tests on your hardware components:

*#0228# - Display the battery status.
*#0289# - Run audio test.
*#0782# - Set date and time.
*#0842# - Test the vibration motor.
*#0673# - Run audio test (MP3).
*#0*# = - Test speakers or/and screen.
*#*#2664 #*#* - Test the touch screen.
*#0283# - Test the microphone.
*#0588# - Test the proximity sensor. 

Advanced settings

You can use the following codes to edit specific settings or perform specific tasks:

Warning: Incorrect usage of these hidden settings and tools could cause your system to become unstable (crashes, data loss...). It's recommended that you backup your data beforehand. For example, learn how to back up your SMS messages with this guide.

*2767*3855# - Factory Reset (wipe your data, custom settings, and apps). Use with caution.
*2767*2878# - Refresh your device (keeps your data).
*#2470# - Enable or disable camera shutter sound.
**04*CPA*NP*NP# - Reset the PIN code.
*#4777*8665# - Test the GPS.
*#197328640# - Go to the Root Debug menu.
*#78# - Go to the Admin Settings menu.
*#9900# - Compile a system report.
*#273283*255*663282*# - Copy data from SD card to internal memory.

Secret codes for Android not working: what to do?

If your *#*#4636#*#* doesn't work, you will have to download a phone dialing app, such as Truecaller: Caller ID & Dialer for Android. After that, you have to use the dialing pad of the app of your choice. Please note that depending on the model of your device, not every app will help you solve the problem and you may have to try different apps to find the one that suits your smartphone.