Dear community members,
I have developped a STK applet that registers to MO SMS Control by SIM which is supported by Nokia phone. In my test, I use 2 different models:
- Nokia 1208
- Nokia 1280
My applet is very simple, when Nokia user write and send a SMS, it will fire the MO SMS control by SIM event and the SMS parameters will be passed to the SIM to ask for permission before sending it. my applet then will be called because it registers to this event, it reads the parameters of SMS and modifies the SMSC number. It returns to the Nokia phone with the status 'allowed with modifications'. Nokia phone will replace the SMSC number and send the SMS.
My applet works fine with Nokia 1280 which means Nokia 1280 replace the SMSC address that it reads from the phone (I put a false number) with the one provided by the SIM, message sent with delivery report. But the Nokia 1208 didn't behave like Nokia 1280, it informs that message sending failed. Using spying tool, I know that the two models receive the same response from the SIM.
The two models support the MO SMS control by SIM. I can't explain why because I don't understand about the mobile phone system.
Firstly, I would like to know whether the SMS sending procedure is exactly the same across different model of the sam 12xx series?
Secondly, If some one would suggest me some possible malfunctionning sources of this strange behavior with Nokia 1208
Thank you in advance and I highly appreciate any help from you.