My girlfriend's iPhone 3G no longer allows her to send or receive MMS. She never plugs her phone into a computer to sync with it, so she didn't do a restore or download a different carrier file or anything. Her three-year-old niece was playing with it before she realized it was doing this, but I couldn't find any settings on the phone that would disable MMS, especially none that the niece could accidentally hit. Any ideas? Thanks.