Hey....not sure if anyone answered your question yet or not...but I had the same problem as yours. I took the phone into a store to get it fixed...and they told me to just reflash the firmware.

I tried it...and it worked.

Let me know if you want the firmware. Below is what the upgrade does for the phone.

I purchased a link to the firmware on ebay...and it worked for my phone. I will however not take any responsibility if does anything to yours though. Sorry.

Let me know.

Features:
- It allows you to use all 3 GSM bands (including GSM900 that is locked in MPx200 sold by AT&T Wireless)

- It removes all operator add-ons (like mMode)

- It adds MMS messaging (which AT&T had removed on their build)

- It adds third party camera support (which AT&T had removed on their build)

- Improves battery life issues*(worked for most people with this issue)

- Improves reception (worked for most people with this issue)

- Unlocks new functions and features including the Camera support!!