I'm having a very hard time with notifications, first I have a 5 minute or sometimes longer delay, the thing is this, it only happens when I imessage my gf (she has a MacBook) she gets my texts on time, but when she texts me it gets delayed to me by 5 mins or more! I have done the usual, disabled iMessage reset network settings, turned the phone off and back on, I tried deleting her messages and still same crap! I'm on a iPhone 4S and I'm using a net 10 SIM card, can anyone help please?