NOTE AGAIN...: I said calling AT&T is an important part of getting this to work. Not because I felt like typing useless information - but because it's an important step. It is true some users have been able to get it work without calling AT&T - also some users haven't been able to get it work even while calling AT&T. Just be sure to ask them switch over the way your phone receives MMS messages. You receive them in link form now. You need them to send & receive just like any other phones. DO NOT ask them to remove the "mms block". Chances are - your phone doesn't have one. You just receive the text messages wrong. ANOTHER NOTE: I keep hearing people saying that they're asking AT&T to remove the MMS block on there account. I said NOTHING about an MMS block. Your iphone is currently set up to receive MMS messages in the form of a link where you have to enter in a username and password. I simply asked them, like stated below, to change the settings so the phone receives MMS messages just like any other phone. Some reps will resist to change these settings. I had good experience from a Business rep. But like I said, Ask them to change the MMS settings so instead of receiving a link, you receive a direct picture. Unless you asked them to block MMS specifically, there will not be a block on your account. note: you must restart your phone after entering the mms settings for the camera icon to appear in the messages application. I just got my MMS working and this is how thanks to users in this thread. http://forums.macrumors.com/showthread.php?t=723378 Goto this link and enable tethering. http://www.9to5mac.com/iPhone-3G-tethering?page= Use this settings (Thanks andrewseely) in settings:general:network:cellular data network APN: wap.cingular Username: firstname.lastname@example.org Password: CINGULAR1 MMSC: mmsc.cingular.com MMS Proxy: 22.214.171.124 MMS Max Message Size: [leave blank] MMS UA Prof URL: [leave blank] Then lastly, call ATT to have them change there MMS settings. I specifically said "Can you change my mms settings so my iPhone will receive MMS just like any other phone instead of the link method". I am now able to send and receive MMS. Hope this works for you guys instead. Here's a screenshot of the convo between the rep. Notice the AT&T network on the top left.