For most users, mobile phones are no longer a secret, but in reality, every smartphone, regardless of brand, hides many secret codes. If you are using a Samsung phone (with Android) or iPhone and you want to know what these codes are and how many types they are, we recommend that you read this article.
What are USSD secret codes?
These secret or hidden codes are the so-called USSD (nn - Unstructured Supplementary Service Data). They were created to help mobile phone troubleshooting technicians.
USSD codes are an additional interface protocol, which allows users to access the hidden features of smartphones. Originally intended for GSM phones, the protocol is now available on modern mobile devices.
They are useful tools in the case of diagnosing the correct operation of the functions of a mobile phone. They are not known to users, but they can always find out from the mobile operator they subscribe to.
USSD secret codes provide useful information about the device software, its model, and even features that you can't access from the phone menu. These functions can only be accessed after entering a unique "key", which consists of signs and numbers.
These are entered in the application that dials phone numbers. In the case of tablets without a SIM card, this application is missing, but its place is taken by the application "secret codes revealer", which can be downloaded for free from the Internet.
However, be careful because some of the codes you'll see below can reset your cell phone to factory defaults, so you can lose all the information stored on your device.
Secret codes for Android
We have compiled a list of the most important USSD secret codes and their purpose, as follows:
# 31 # phone number - hide the number when you call someone.
* # 06 # - shows the unique IMEI code, which is useful in case of loss or theft of the phone.
* # 30 # - starts / closes the identification number.
* 33 * # - deactivate outgoing calls (typing # 33 * pin # reactivate the function)
* 3370 # - activates EFR encoding, which improves communication quality but reduces battery life (typing # 3370 # reactivates the function).
* # 5005 * 7672 # - Displays a service center number for the current provider.
* 3001 # 12345 # * - provides the phone signal information in numbers.
* # * # 4636 ** # * - Displays battery and Wi-Fi information.
* # 34971539 # - provides camera information.
* # * # 2663 # * # * - Displays the touch screen version.
* # * # 2664 # * # * - Tests the sensitivity of the touchscreen.
* # 1234 # or * # 44336 # - provides firmware version information.
* # 232338 # - displays the WLAN address of the device.
* # 7465625 # - check the phone's simlock network.
* # 0588 # - tests the camera's proximity sensor.
* # 0228 # - Displays battery statistics.
* # 0289 # - tests the phone's audio system.
* # 0782 # - Displays the date and time configured on the device.
* # 0842 # - tests the vibration mode and the lighting system.
* # 0673 # - tests the sound of the device.
* # 0011 # - displays basic phone information.
* # 4777 * 8665 # - GPRS tests and device setup menus.
* # * # 8255 # * # * - displays Google Talk Service.
* # * # 4986 * 2650468 # * # * - Displays hardware, RF, and firmware information.
* # * # 1234 # * # * - displays the firmware version of the phone.
* # * # 1111 # * # * - Displays the operating system version.
* # * # 2222 # * # * - Displays the AI hardware version.
IPhone secret codes
As with Android mobile devices, we've compiled a list of the most important USSD secret codes for iPhone, as follows:
* # 06 # - displays the IMEI code.
* 3001 # 12345 # * - advanced network settings.
* # 21 # - show call forwarding settings.
* # 31 # - Hide phone number.
* # 43 # - Displays call waiting settings.
* # 30 # - caller number display status.
* # 33 # - call barring settings.
* # 61 # - Displays missed calls.
* # 62 # - Check forwarded calls if no network is available.
* # 67 # - Forward a call when the user is in another conversation.
## 002 # - Disable call forwarding.
Read also: How to unlock your mobile phone if you forgot your PIN
What is the PUK code of the SIM card, how do you find it and when should you use it?
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