EDIT: Resolved this already, luckily. I had facetime turned off Under settings>General>restrictions. As soon as i turned that on again, it asked for my facetime login and iMessage login. Odd that iMessage should be linked to the facetime settings... ------- Has anyone else come across this? Within settings, I can slide iMessage to "On", but nothing happens. I get no message about activation, no additional settings options appear. If i then use the messages app or double-tap>close settings it reverts to off! I seem to be completely unable to use iMessage. Everything else in iOS 5 is working fine. Does anyone have any suggestions? Cheers.