Hi Dan,
Would you be able to post up your code for receiving SMSs messages?
I am working on a project where, when a smoke detector is activated, it sends an RF signal to my Arduino which then calls or texts (or both) my phone. It is working great but I want to be able to send an SMS containing a phone number to Arduino which then becomes the default number that is called when the smoke detector is triggered. In summary I am having no joy receiving SMSs!
Cheers,
Dave