I have an original iPhone with baseband 0.4.05.0.4, OS 3.1.3 on it. I upgraded to a iPhone 4. Now I have this iphone around and would like to unlock it to use as the house phone. I currently have a motorola phone with a AT&T sim in it. I have jailbroken then original iPhone and have cydia on it. How do I unlock it so I can make calls on it with the sim card currently in the Motorola? Thanks if anyone can give me nice instructions. It's a little confusing with all the 'sn0w's' out there and which OS can be unlocked and all.