Hi, I've looked around but can't really find a clear answer to this. I have an original iPhone EDGE and would like to upgrade to a iPhone 3GS to get its hardware improvements. I, however, don't mind not having 3G as I often have WiFi and find EDGE fast enough for my needs. I know there's a way to turn off 3G in settings. So, if I put my EDGE SIM card in the new iPhone and turn 3G off can I keep my current $20/month EDGE plan? Any help at all would help, Thanks so much!