Unable to send/receive MMS
I am not sure when this problem started but i have been been able to send/receive MMS since i updated my iPhone to 3.1.3 (using Pwnage tool 3.1.5). My iPhone was jailbroken and unlocked using Blackra1n on 3.1.2 prior to updating to 3.1.3. Initially, i thought this may be an artifact of using Pwnage tool so i downgraded my iPhone to 3.1.2, jailbroke and unlocked again using Blackra1n. After the downgrade i still cannot send/receive MMS. I have no problem sending/receiving SMS. Since i am on AT&T, i cannot see the Cellular data network setting. In order to see that setting, i replaced with a non-AT&T SIM and the APN for SMS and MMS are both wap.cingular. All other fields are blank. iPhone is on carrier profile AT&T 5.6. Can anyone think of a reason why i am unable to send/receive MMS?