I can't get this to work & wonder if anyone else has: I want to be in Airplane Mode (but turn Wifi on) and send iMessages from my iPhone. It seems like I can send iMessages (and they say delivered) but I cannot receive them. Does this only work if you have a phone number & Apple ID associated with iMessage? (I don't have an Apple ID associated with mine). FYI: The reason why I'd like to do this is my basement receives almost no cellular signal (constantly says "Searching"); so that drains the battery fast looking for a signal. So I would still like to send iMessages via my iPhone without my phone's battery going from 80% to 35% in two hours!