Just got me and my boyfriend new phones. Got them all activated or so I thought. Tried using the web browser and it comes up with Data Restriction-36 the same when someone sends me a picture. Now out of the blue both of our phones come up with Unregistered Sim from time to time. Turn the phone off and then on and we go back into home or rome. Getting really frustrated with all this. Anyone out there have this issue and know how to cure it?