Why does 'USSD code running' appear when I call? Explanation and solutions

In the wide and complicated world of mobile telecommunications, one of the phrases that can often appear on our phone screen during a call is '**USSD code running**'. It can be disconcerting, even alarming to some. However, there is no need to worry. The term 'Running USSD Code' refers to an integral and common part of the communication protocol between our phone and the mobile network server. In order to get rid of any confusion that may arise regarding USSD codes, this article has been delegated to comprehensively explain their concepts, uses and solutions to problems related to them.

What is a USSD code?

A USSD Code (Unstructured Supplementary Service Data) is a communication protocol used by GSM (Global System for Mobile Communications) networks to send text messages between a mobile phone and the telecommunications service provider's network. It is used to provide location-independent services, such as establishing a network connection, performing a balance transfer, or paying bills.

USSD codes are also used to access hidden menus and activate different functions on the mobile phone. They are essentially commands that can be typed into the phone's dialer to turn certain features on or off. Some codes are specific to the phone make or model, while others are universal and work on any device.

Why does 'USSD code running' appear during a call?

The phrase '**USSD code running**' usually appears when the user has entered a USSD code on their device. Some examples of USSD codes can be used to obtain information about the balance of available airtime, roaming charges, internet data usage, among other multimedia services.

It is important to remember that each service provider has its own set of USSD codes. Some codes are available to everyone, while others require a certain kind of subscription or specific service with the service provider.

Possible Solutions to 'USSD Code Running' Issue

The self-contained 'USSD code running' message may get stuck on the screen for an indefinite amount of time due to various factors including mobile network issues or mobile device issues.

• **Check mobile network**:
  There may be a problem with the service provider's network. Try power cycling your phone to reestablish the network connection.
• **Check if the USSD code is valid**:
  Some USSD codes only work on certain network operators or telephone types. Make sure the code you are entering is valid for your carrier and phone.
• **Update phone software**:
  Phone software updates usually include bug fixes and improvements that can resolve this issue.

Ultimate solution to 'USSD code running' issue

If the problem persists after performing all the previous steps, it is possible that the mobile device has more serious problems. We recommend taking the device to a brand service center or your network operator's technical support for a more robust solution.

Precautions when using USSD codes

As a last tip, it is important to mention that by typically setting up USSD codes, you unlock certain technical aspects of the phone and therefore, it is crucial to use them with caution. Some codes can change the functionality of your phone or even erase data, always make sure you know what a USSD code does before using it. These codes are powerful tools, so their incorrect use could cause unwanted inconveniences.

We hope this tutorial is useful and allows you to understand what the '**USSD code running**' message that appears on your screen from time to time when making a call is about.