Some of you may recall me posting a day or so back on my finding a few bugs in IOS11. As a result I decided to downgrade to IOS10.3 till the bugs are fixed.
For those interested I was able to downgrade my iPhone back to version 10.3. The process was easy using iTunes. It can be done with JFW or NVDA.
See the links below for more information.
Just take your time and the process should go smoothly.
https://www.digitaltrends.com/mobile/how-to-downgrade-from-ios-11/
http://www.redmondpie.com/download-ios-10.3.3-final-ipsw-links-for-iphone-ipad-ipod-touch/