Board Thread:Game Discussion/@comment-28169398-20171107173858

I just followed this OSX Daily guide.

http://osxdaily.com/2017/09/24/install-ios-11-with-ipsw-firmware/

I did not lose any data following this method and I did not have to restore a backup. Opened RR3 on my iPad which I restored using this method and on my iPhone and everything is the same. I still have to play test to see but I will report back soon.

You should have the most recent version of iTunes installed when you do this.

And you can find the link to the device specific ipsw firmware file at this link: http://www.redmondpie.com/download-ios-11.0.3-ipsw-links-and-ota-for-iphone-ipad-ipod-touch-device/

The links are to the files on Apple's servers, so they would appear to be legitimate. 