I know when I used to have T-Mobile service, I could send an email to <phone number>@tmomail.com and it would convert that message to SMS and send it to the phone. I never did try it with an attachment, so I don't know if it could do the same with MMS. Anyway, I've now switched to AT&T and wondered if I could do the same? If so, does anyone know the address format? I called AT&T and the woman I spoke to had no clue what I was talking about.