Hello guys I finally got my MMS & EDGE to work with the iPhone 4 on T-mobile USA. (I have the Unlimited Even More Plus Family Talk and Text with the $10 Unlimited Web For Phones) I will post everything I did to get it to work and tomorrow I will do a demonstration of it working so you guys can believe me! Unfortunately still not Facetime, but nor really important to me! 1.Jailbreak and Unlock your phone using Jailbreakme and Unltrasn0w 2. Settings -> General -> Reset -> Reset Network Settings (Only do this if you have already tried changing your settings) 3. Cydia -> Manage -> Sources -> Edit -> Add -> http://beta.leimobile.com/repo -> Return To Cydia 4. Click on LEIMobile Repo -> Install T-Mobile 4.0 MMS Fix -> Reboot 5. The previous steps were done with the T-mobile SIM in your iPhone 4, after you complete those 4 steps take out the T-mobile SIM and insert the AT&T SIM.....wait 10 sec and take out the AT&T SIM and insert the T-mobile SIM. 6. Settings -> General -> Network -> Cellular Dada Network -> Type in the following settings! Cellular Data APN: internet2.voicestream.com Username: Leave Blank Password: Leave Blank MMS APN: wap.voicestream.com Username: Leave Blank Password: Leave Blank MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc MMS Proxy: 216.155.165.050:8080 MMS: Max Message Size: 1048576 MMS UA Prof URL: www.apple.com/mms/uaprof.rdf When I send an MMS to myself it sends and a couple of seconds after it sends I receive it, The only issue Im having is when someone send me an MMS I can't receive it, this is what I get: "The media content was not included due to a picture resolution or message size restriction." As soon as I get this fix I will post it here! If anyone needs help just let me know!