you need to set your TCP settings under options > advanced > TCP
wap.cingular
CINGULAR1
those are the settings, in that order, in that case. you will still get data connection refused and edge in lowercase, since you do not have a BB data plan. . you wont need to switch networks for this to work, nor is it an unlocking issue. as for the faq clear your cache manually in your browser and you should be fine after that