So you can facetime on airplane mode with wifi on (but only with a SIM card). But these days, I am just using my iPhone 4S as an "ipod touch" since I got my Nokia Lumia 900. I tried FaceTime with my wife (without the SIM card in the the iPhone 4S). Tried it on airplane mode with wifi and tried it not on airplane mode. Both times it gives me error message. Doesn't make any sense why Apple doesn't allow FaceTime without a SIM. I can still send iMessage over wifi without the SIM. So Apple knows my Apple ID What I don't get is I CAN STILL RECEIVE factime calls on my iPhone 4S without a SIM. Plus I can still place facetime calls WITHOUT my SIM in my Verizon LTE iPad. So is Apple discriminating again the iPhone users?