First you need to unlock and jailbreak your iPhone 2g using redsnow then got to Cydia and search for activatemms2g and install it and your iphone will reboot. then on your iphone go to http://unlockit.co.nz then tap Continue then Custom APN Tap Blank next to Carrier and Choose US T-Mobile (on AT&T choose US AT&T) After that click Create Profile and Install Then replace internet2.voicestream.com with wap.voicestream.com Then go back to home screen and tap Settings > General > Network >Cellular Data Network (AT&T users can skip the rest of these steps and just power off your iPhone and turn it back on ) This is optional but in Cellular Data replace wap.voicestream.com with epc.tmobile.com ( is the one I use) or internet2.voicestream.com In MMS UA Prof URL you can replace the apple one with http://wap.sonyericsson.com/uaprof/w800ir101.xml it seems to send my pictures faster… Remember any changes you do and want to have stay in with the APN you must hold the power button and slide to power off in the Cellular Data screen. These steps are the exact steps I used to get my MMS running on T-Mobile in the USA with the T-Zones 5.99 internet plan.