It's pretty easy - all you need to do is change the Class of the SMS PDU to 0. I've written a short tutorial in Python showing how it can be done: http://shkspr

It's pretty easy - all you need to do is change the Class of the SMS PDU to 0. I've written a short tutorial in Python showing how it can be done: http://shkspr.mobi/blog/2012/06/raspberry-pi-python-and-3g-dongles-oh-my/ http://shkspr.mobi/blog/2012/06/raspberry-pi-python-and-3g-d... In this case, I'm using a basic 3G dongle and Raspberry Pi - it should work on any device which allows serial port access. A few phones have the capability via 3rd party apps - they all seem to be ancient Nokia & BlackBerry devices. Amusingly, iPhones don't (or didn't) display the sender's number on Flash SMS, so you could text very realistic looking prank messages like "This phone has been recalled - please nearest Apple store" etc. Flash SMS is a bit like Push To Talk - one of those standards which never quite took off the way it should.