Install iOS 11.4 Beta for Other Potential Improvements
If you're dealing with another unfixable bug or performance issue, you might want to give iOS 11.4 beta a go on your device.
The iOS 11.4 beta has issues, but it could have a positive impact on whatever it is you're dealing with on your current version of iOS.
Betas have also been known to iron out battery life issues, fix random reboots, improve user interface speed across the operating system, and resolve connectivity issues.
If you're struggling on iOS 11.3.1 or another version of iOS, you might want to give the iOS 11.4 beta go. It could actually improve your device's performance.
If it doesn't, you can always drop back down to iOS 11.3 or iOS 11.3.1.