are you jailbroken or have you ever jailbroken?
i'm having this problem on Rogers. I have friends on every carrier that are NOT having this problem, jailbroken or not. So its not carrier specific, nor jailbreak specific.
The reason I think I'm having this problem is because of the weird ways I've kept my texts. Or at least that's what I think
I've had an iPhone since the first iPhone in 2007. Before I got the iPhone 4, when I would upgrade the OS of my previous iPhones, I would full restore and then only replace the SMS.db file because that's all I wanted to backup.
Then when I got my iPhone 4, since there was no jailbreak at launch, I applied my pre-iPhone 4 backup to my iPhone 4. This caused my MMS on my iPhone 4 not to work because of permission problems. I have to recursively set the permissions of /var/mobile/library/sms to 777 in order to make MMS work.
I then applied this pre-5.0 iPhone 4 backup to my iPhone 4 at 5.0.
I was thinking that this weird journey of my SMSs may be the problem, but I doubt anyone else has done this as well.
If this problem is happening for people that have NEVER jailbroken, that puts me at ease and lets me blame Apple 🙂
btw I'm Basir in the apple thread