Why is my iMessage being sent as a text message?
A couple of days ago I installed iOS 5 on my iPhone 4. Now, for my contacts who also own iPhones, iMessages seem to be activated. When I send a message, the bubble is blue, indicating an iMessage.
But then, a few minutes later, these messages are turning green, and underneath them is a line saying "sent as Text message".
Is this a bug? Why's this happening? At the moment, iMessage seems to be useless, at least for me. (I'm in Canada, working on a Bell contract. Does that factor in?)