A co worker gave me his old iphone 3gs a few weeks ago. but it had been wiped. the LCD screen was cracked as was the digital glass. I replaced both, and loaded it up on itunes. but is had already been restored to he factory settings. I cannot get into it to check firm ware versions and such. Im wanting to unlock it as well so i can actually use it as an upgrade (Im currently using a 3G) Seeing as it has the latest update, can i still downgrade it and then jailbreak/unlock? even when its back to factory settings?
Asking me for a valid SIM card (Which i have just not registered the that phone clearly)
Any help would be great thanks!