OK, cant unlock the iphone just yet, but, from my tests, it seems the issue has something to do with BIS or BES. I broke out a bone stock V3t (thats a Razr) for the tests, and had no issues whatever either sending or receiving MMS, with or without pics. Now, the 8310 does *not* use either BIS or BES. I dont feel like paying for the BB data plans, so I set my TCP and wap settings manually. Any other thoughts let me know.