Yes!
Before you do the Unlock + Jailbreak using Pawnage, insert the simcard first.
Go here for Pawnage instructions
iClarified - iPhone - How to Unlock/Jailbreak Your 2.x.x 2G iPhone Using QuickPwn (Windows)
Make sure you include Cydia and Unlock option.
After you restore the iPhone with the default 2.2 firmware,
you will be asked to Activate your iPhone on iTunes.
DONT MIND THIS!
Do Not Activate!
Just go on with the Pawnage.
Then after the Pawnage, assuming you are on wifi,
Install BossPrefs from Cydia
Turn off the Edge
Do not worry about the E icon on status bar
Because it's always there.
BOOM!
There you go!
You just Unlocked + Jailbroke your iPhone
Without the Data Plan
Happy!
just like me...
