I have tried everything I can think of to get mms to work...I downloaded the Carrier 5.0 from 4.0 and I am on firmware 3.0.1. After installing the carrier 5.0 I had the option to send MMS...in the txt message the little camera came up and I could select a pic and had the choice to send via MMS but they just timed out and would get the little red explanation point. So I put my iPhone SIM card in my Nokia 5800 Express and I made a few calls, checked voice mail, sent a txt and MMS message. I then took the SIM out of the Nokia and back into my iPhone thinking I was going to be good for MMS but it wiped out all my settings for MMS on the iPhone...I no longer have the option for MMS in TXT or in Messages. But the Tethering option is still there which i do not care about.. What gives....I even jailbroke it and used 3.0 firmware and still did not work...So then I loaded Swirly MMS2 and if I wanted to use it I had to pay $12..NOT!!!!!! so now I upgraded to 3.0.1 with Carrier 5.0....jailbrake was removed... OH this is on 3G S phone only 2 weeks old..