For the latest experiment, I found an AT&T "Go Phone" Nokia 2610. I turned it on right next to a running OpenBTS system. It powered up, registered with OpenBTS and then tried to send an SMS to the private ISDN address 1111340002 via an SMSC at + 14047259800. Here is the raw TPDU of the message.
If anyone has immediate ideas on the meaning of that 69-byte payload or what the handset is expecting to see in response, let me know. The known parameters are:
- IMSI 310410250887606
- MSISDN +1 707 386 8928
- PIN 8928
- ICCID 8901 4104 2125 0887 6088