Okay, so ive done some looking around on different websites and i have no clue whats wrong with my phone. I have recently bought the Samsung Galaxy s2 SGH-i727. I used to have a Samsung Galaxy s1. I have my 3G SIM in my Galaxy s2 now and its a 4G phone...will that affect it? Plus i have tried a million different APNs to see if that would work, and it hasnt. Im able to send/recieve text messages, but i cant get MMS. I also use AT&T GoPhone as my carrier, but i didnt have this problem with my S1...Please help!! It will be greatly appreciated!! Thanks!