I did a full erase + reset of my 3gs. Running 6.1.3. Trying to activate iMessage and I get "waiting for activation". A few seconds later, an SMS arrives that looks like: ?????@@REG-RESP?v=3;r=xxxxxxxxx;n=+44xxxxxxxxxxxxx;s=xxxxxxxxxxx From what I understand , this is the configuration information that iMessage needs. But for whatever reason, it's coming through as text to me rather than data to the app. I have followed many guides online to get iMessage working. I have reset all contents and data on the phone and set it up as a new phone, not connected it to any Apple service and then activate iMessage. Same thing - an SMS comes in and iMessage doesn't activate. I've spent 4 hours looking at this. Also spoke to O2 and they say nothing is wrong with my account so it should work. Please help!