How to downgrade iOS11.3.1 to iOS 10.X on A7 devices with SHSH blobs

After posting a successful downgrade post, many people were confused about how it is possible even if the sep from iOS 11 is incompatible. In this post, you can read how to downgrade using iOS 10.3.3 OTA update files on A7 devices. It may also work in other devices like iphone 6 and iphone 6 plus. It is really simple. First of all this tutorial is for Linux and macOS, so if you are using…

SHSH2 blobs are required for downgrading iOS version. You should backup SHSH2 blobs for every version. Here's how to backup iOS 10.3.1 / 10.3 SHSH2 blobs for future downgrade! 

SHSH2 blobs are the files required to restore to unsigned iOS version (downgrade) using Prometheus. Some blob files aren't valid, and can't be used. Here's how to find out if your SHSH2 blobs are valid!

SHSH2 blobs are required for downgrading iOS version. You should backup SHSH2 blobs for every version. Here's how to backup iOS 10.2.1 SHSH2 blobs for future downgrade!

If you ever need to downgrade your iOS device back to iOS 10.2 you should save your SHSH2 blobs now! Here's how to do it on Mac!

If you ever need to downgrade your iOS device back to iOS 10.2 you should save your SHSH2 blobs now! Here's how to do it on Windows!