GSM Codes with Osmocombb

Fabio Pietrosanti (naif) lists at
Sun Jan 9 14:08:21 UTC 2011

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) .

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 :-)


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