I have several (30) 3G and 3GS IPHONEs I got from a company when they upgraded. I am wanting to sell and have been asked what version and firmware is on the phone. When I connect to Itunes it asks do i want to restore as new and I selected an old backup and it said the software is too old. I tried another old backup file , it accepted it and replaced the old version with the current one. How can I determine the version and firmware without updating to the new version? Many want the old version's.