List of USSD Codes & GSM Codes

Do you know the smartphone codes - USSD or GSM codes? We explain in this article what the cell phone codes are all about and how you can use them on your Android phone or iPhone.

You can access the hidden functions on your smartphone via the so-called USSD or GSM codes. Using a short string of numbers and characters, you can, for example, display your own phone number, set up call forwarding or check your prepaid balance. Some functions depend on the operating system (Android or iOS) or your mobile carrier.

GSM codes & USSD codes

What are USSD codes or GSM codes?

Global System for Mobile Communication (GSM) and Unstructured Supplementary Service Data (USSD) are cell phone codes or smartphone codes that have been used since the early days of mobile telephones and cell phones.

With the individual GSM codes you can, for example, change services such as call forwarding, mailbox or SIM card settings. These codes are the same in all common mobile networks.

The USSD codes, on the other hand, refer to the individual communication and network providers and can therefore differ in detail.

However, both codes have one thing in common:

The cell phone codes are used to control functions in the cell phone or settings related to the network. In other words, they can be used to display your phone number or your prepaid credit or to change your network settings.

Depending on the network provider, different functions are available to you.

How to use the codes

Cell phone codes are entered via the phone's call app or your phone number field:

Most cell phone codes use the hash "#" symbol and the asterisk "*" as special characters.

Between the two special characters you simply enter the desired combination of numbers. The codes are activated automatically after the input or you confirm the input with the handset symbol ✆.

All important USSD & GSM cell phone codes

As mentioned above, the smartphone codes are device- and network-dependent. It is therefore possible that not all of the codes presented here will work on your device.

To give you an overview, we have divided the cell phone codes into general GSM codes and device-specific codes for Samsung, Huawei and the iPhone.

Be careful.

If you don't know exactly what one of the codes does, be careful. Use the presented cell phone codes at your own risk!

Please remember that many codes work only after confirmation (tapping the handset icon ✆).

List of GSM Codes

These universal GSM codes work across all devices and carriers, though some may vary slightly depending on your mobile network provider.

Apple: List of USSD Codes

Let's start with the USSD codes for all Apple iPhone and iPad devices. Below you can see all the mobile codes for all iOS devices.

Samsung: List of USSD Codes

Even the Galaxy from smartphone manufacturer Samsung has its own specific cell phone codes in addition to the generally valid GSM codes.

Huawei: List of USSD Codes

The manufacturer Huawei also has its own cell phone codes, which you can see in the table below.