(This is a post from the iPhone 4 forum, but I feel it better fits in this forum.)
So all of a sudden, my iMessage is not working properly. Anyone that I can iMessage with, it lets me send to them perfectly fine, however their messages to me keeping coming in as texts. This is very frustrating to me because the messages stall and it takes a long time for me to get them. I have turned off and on iMessages, quit the Messages app, restarted my phone... nothing is working. I, supposedly, have perfectly fine 3G access. I did notice that when I am in the phone, like using it, the problem doesnt happen. But when my phone is not in use is when it occurs. Has anyone seen this before? I don't know what to do!