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Help USSD codes??

C

Craig12

Member
Just wondered what these actually are? and what they give acess to??
Are these the *#numbers# ive heard about??

i know the *#06# gives the imei and *#03# gives a nand flash unique number does anyone know what this is?

Just wondered if there were any interesting codes to know about?
 
Unstructured Supplementary Service Data (USSD) is a protocol used by GSM cellular telephones to communicate with the service provider's computers. USSD can be used for WAP browsing, prepaid callback service,mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network.
USSD messages are up to 182 alphanumeric characters in length. Unlike Short Message Service (SMS) messages, USSD messages create a real-time connection during a USSD session. The connection remains open, allowing a two-way exchange of a sequence of data. This makes USSD more responsive than services that use SMS.

Source: wikipeida.

Peace
 
I saw that the code for Proximus (Belgian Operator) #121# did work. Now, it doesn't. But actually it displays the message 'ussd-code active', but nothing happen. Any idea how to solve this issue?
 
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