iPhone customers who purchased their device on launch day last year are being told by AT&T that they are not eligible to upgrade their devices for $199 despite the longer than normal time between devices.
The average iPhone customer is now holding on to their device for four years before updating, up from three years in 2018, according to Bernstein analyst Toni Sacconaghi.
These are instructions on how to jailbreak your iPhone 3GS and iPhone 4 using Greenpois0n for Mac. Greenpois0n has been updated to support the iOS 4.1 and iOS 4.2.1 firmware