did you change to gsm? guess i did leave that step out
dial *#*#4636#*#* and you should get a programming menu. choose phone info and then change the prefered network type to GSM auto(PRL). i usually refresh the smsc,but idk if thats needed. back out to your home screen and at that point you shuld get some singnal bars,and working voice/sms. then enter the APN info and you should have working edge and mms