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16 secret GSM codes for Android smartphones

Secret menus and quick links to Short Android? With so-called GSM codes, certain functions and hidden settings on smartphones can be activated. We show you the best GSM codes for your handset.

The abbreviation GSM stands for Global System for Mobile Communication, and dates back to the early days of mobile phones. Up to the present time, however, certain combinations of numbers - the so-called GSM codes - survived, which can also be modern Android smartphones use yet. The codes work here partly as shortcuts to perform specific functions or are used to retrieve a hidden test and setting menus.

However, there are limitations. Since the selection of Android smartphones is now huge, automatically does not work, any combination with any device. We have the GSM codes retrieved that should work with many Android devices. Be entered the codes in the smartphone phone menu. Some codes start immediately after entering, in others the start must however be confirmed with the handset button. In part, this is also different from phone to phone.

GSM codes: Hidden menus and information
The comprehensive test menu can be opened # 0 * # * with and is mainly meant to verify that the individual features of your smartphone to work as expected. Testing can be, inter alia, the display, the speaker, camera, various sensors and the vibration motor.


 * # 0 * # Test menu display, speaker, camera and sensors
* # * # 4636 # * # * Opens an expanded Info menu
* # 0228 # Show Battery information
* # 1234 # firmware version
* # 2222 # Display hardware version
Show * # 06 # serial number of your smartphone

Short Links for calling features
By you the key code # 31 # typing for calls prior to a phone number, you go make sure that the called party can not see your number on its display. Of course, this setting can be changed globally in the system menu of the smartphone. But if you want to hide his number for a single call without spending consuming tinkering to the settings, but can also use the GSM code. The opposite effect has the GSM code * 31 #.

Hide # 31 # phone number
* 31 # before the number entry makes this apparent
* # 30 # Check status of the number display for incoming calls
Check * # 31 # status of number display for outgoing calls
* 43 # Call Waiting Switch
Off # 43 # Call Waiting
Check * # 43 # status of the call waiting function

Setting up call forwarding and change PIN
Even more comfort functions can be made via GSM code. Do you want to divert, for example, calls from your phone to another device, then it is possible that also make a combination of characters.

** 21 (destination number) # redirect all incoming calls to another phone
Delete ## 21 # Call Forwarding
** 04 * old PIN * new PIN * new PIN # to change the PIN code of the smart phones.
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