Following the code in Reto's book I am sending an SMS from one emulator to another. Emulator 1 uses the port address of emulator 2 to send to. If I use the correct port address the message shows up on the 2nd emulator. If I use a false address although the message does not show up the Activity.RESULT_OK shows -1 which indicates that the message was succesfully sent. I also have a receiver to check the result when the message is delivered but this code is never reached whether I use a valid delivery address or not. For a start can anyone confirm that testing between emulators should activate the 'delivered' Pending Intent? If so any suggestions as to where to look for the cause of the problem. Thanks.