Try the iOS 10.3.3 Beta If You're Having iOS Problems
If you're experiencing iOS 10 problems on your iPhone, iPad or iPod touch you might think about trying the iOS 10.3.3 beta. It could improve your device's performance.
iPhone and iPad owners continue to complain about various iOS 9 and iOS 10 problems including abnormal battery life, broken Wi-Fi, busted Bluetooth, UI lag, crashes, lockups, freezes, and various issues with apps.
The iOS 10.3.3 update appears to be a maintenance release which means it should deliver some under-the-hood improvements to iOS 10 users.
The iOS 10.3.3 beta doesn't offer a long list of changes but there's a chance it could improve your device's speed, its battery life, its connectivity, or another area of performance.
Remember, you can always drop back down to the iOS 10.3.2 update if the iOS 10.3.3 beta fails to fix whatever it is that you're dealing with.