iPhone 4 running on 4.3.3. iTunes on my MacBook Pro is 10.4.1. On AT&T network, only used RedSn0w to jailbreak, not unlock. I know the mute button is not on. The SMS tones are selected, not custom, just the ones on the phone. I do have a theme I downloaded that had a tone, I changed it, it worked for months, now it is not. Ringtones & music play fine, but SMS or MMS just vibrate. So I know the speakers are ok. Anyone else come across this? Or any ideas how to fix this? I just tried updating my phone to 4.3.3 & my iTunes & re-jailbreaking to see if that helped, it did not. Could it be the theme I have on there? Its the EnVy HD. I do have iBlacklist installed on my phone, but always have since it was jailbroke, problem started about a few weeks ago. Driving me nuts. Any help is appreciated.