I have a couple of friends that send me picture messages (MMS) all the time. Some days i can receive them in about 2 min. after they send. and other days i cant receive them at all. At 5 o clock my friend sent me a pic and i got it, then 10 min later he tried sending me another one over and over again about ten times and They just don't make it to my fone. Can someone help me understand why it does this?