I put the 9.99 plan on my tmobile service for 100mb a month and it wont work i keep getting this screen that says subscription upgrade required any help would be nice and my phone is on 2.2.1 with a gevey adapter on it thanks
I don't believe that plan will work for you, obviously.
It was called web2go and T Mo figured it out so now you must have their new data plan which is $24.95 I believe. Sorry
Try going into Settings > General > Network > Cellular Data Network> internet2.voicestream.com as the APN and leave the other fields blank.
or try these APN: epc.tmobile.com, wap.voicestream.com
One of these should work for you but the speed isnt as fast, hope this helps. There are alot of links about this on the forum, try searching for different terms and you should find things easily.