can i downgrade my ipone ios
1 The exception to this is downgrading from iOS 8 to 7.1.2, which will be possible for a short time on most devices. 2  The iPhone 6 and 6 Plus cannot be downgraded, since they started with iOS 8. 3  iPhone 3GS/4, iPad 1, and iPod Touch 3rd/4th Gen â You can downgrade these devices if you have the proper SHSH blobs. The iPhone 6 and 6 Plus cannot be downgraded, since they started with iOS 8. 2  iPhone 3GS/4, iPad 1, and iPod Touch 3rd/4th Gen â You can downgrade these devices if you have the proper SHSH blobs. 3  SHSH blobs are the signed certificates that allow you to downgrade, and are unique for each device.