Hey! I bought an iPhone 4 off of eBay factory locked to Three. I now would like to unlock it if possible. The guy who originally owned it said that hes still using the sim that he used in the phone I bought off of him and he said that he cant do the unlock because he doesn't want his sim to be terminated. Is there another way I can do it permanently? Im open to doing some jailbreaking as thats my plan anyway. PS: Can Jailbreaking give you the no signal issue? Thanks!