On 09/01/11 14.55, Sylvain Munaut wrote:
Sure: Read the specs for USSD, implement them and submit the patch :)
A long time ago when i was young and under 18 years old, made a small USSD scanner by scripting modem interface to find out undocumented USSD codes in operator's networks.
Found a lot of USSD codes giving "Syntax error" or "APPLICATION NOT REGISTERED" or "Timeout" . I always desired to have an USSD scanner and USSD parameter brute forcer running directly inside a phone!
Another cool protocol like USSD is the UUS (User to User Signaling) http://www.turkcell.com.tr/c/oth/terminalpdf/23087-800.pdf .
For sure it's not provided on mobile handsets, but who know, maybe some networks have it by default allowed and two GSM subscriber could exchange data for free :-)
Fabio