Shutter is absolutely correct. I followed his instructions letter for letter in another thread and got my MMS working as well around 1 1/2 months ago. On my Account on the AT&T website, it still shows that I have the iPhone 3G, BUT I have a regular unlimited messaging plan and my account is provisioned for MMS. I was helped by an extremely friendly regular AT&T rep who followed up with calls later to ensure that everything was working smoothly for me.
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Can someone tell me which thread shutters directions are in for enabling MMS?
I searched threads for his username but there are wayyyy too many to read through each and every thread
Thanks!