Check this link out. I also just bought the rizr unlocked to use on cingular and could not get a GPRS or Edge connection. I followed these steps and now i can connect...makes the phone so much better to be able to now use the internet
I need the cingular internet/browser configuration settings to be used on an unlocked motorola rizr z3. I have tried the settings for the V3i and the KRZR K1. Both of those don't work. If anyone can provide the information, it would be appreciated!!