what is the ideal settings for t jailbroken iphone (tmobile)

i read many places about setting the iphone to tmobile settings (APN/MMS Settings) but are there other settings that you should set if your on a jailbroken unlocked iphone?
I know tmobile doesnt support the 3g service that the iphone is capable of (it runs on EDGE) so is there any way to check the speed of the service? what about checking Wi-fi connectivity?

(i recently jailbroke and unlocked my iphone but the wifi isnt working properly. i have tried several things and it still isnt responsive to a wifi enabled community. WTF.

*tried reseting network on the iphone
*resetting network connections.


thanks