Where I can find the USSD commands specification?

Posted by Lorenzo Melato on Stack Overflow See other posts from Stack Overflow or by Lorenzo Melato
Published on 2010-05-06T13:17:43Z Indexed on 2010/05/06 19:48 UTC
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Filed under:

gsm

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ussd

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mobile-phones

I need to implement a simple application to send short notify messages on gsm phone display via a GSM modem.
I know that I can use the gsm USSD protocol to send messages instead of sms in order to speed up the delivery.

Where I can find a detailed reference on the available USSD messages?
Where I can find examples or sample applications?
All mobile operators supports the USSD protocol?

Lorenzo

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