Board Thread:Game Discussion/@comment-28169398-20171102025118/@comment-86.157.147.32-20171107170830

https://www.gottabemobile.com/how-to-downgrade-ios-11/

I followed the instructions on this website to roll back to 11.0.3  I installed iOS 11.0.3  using itunes on my Mac, but used an old iCloud backup to restore my iPad. If you you try to restore a backup saved under 11.1, it will want you to install ios 11.1 again.

I did loose some old emails when I reverted to 11.0.3 (not backed up), not a problem for me though, as I had copies on my Mac. Worth thinking about what might get lost, when reverting.