Apple iPhone 3GS

Is there anyone having problems receiving pic messages on the iphone. I have and it is somewhat frustrating when you get the pic 7 to 9 hours later. I have had At&t for about 4 months and I am very satisfied with the iphone, but the service has dropped calls on a daily basis and now not receiving pic messages tops it. Just wondering if there is anyone else having the same problem. I am past the point of an apology from At&t making it all better. 😢