I bought a 9850 torch from Verizon and unlocked it so I can use it on ATT, I can only get EDGE service not 3G. Is there a way to get the 3G to work

Probably not. The GSM side is designed primarily for overseas roaming. The only UMTS band included is 2100MHz.

RIM BlackBerry Torch 9850 specs

Yep. EDGE only on that device on AT&T. No 3G. The bands are not there.