became a legendary file in the tech underground. It was the key to "unlocking" the device so it could be used with carriers other than AT&T. The Story of the "Golden" Bootloader
When Apple first released the iPhone in 2007, it was locked tight. Early models shipped with Bootloader 3.9 3.9 Bootloader Iphone 2g Download High Quality
: Allowing the iPhone 2G to work on T-Mobile or international networks. Downgrading to iPhone OS 1.0 became a legendary file in the tech underground