Η new update of iOS 9.3 is reportedly causing an unexpected bug that freezes iPhone 6s and 6s Plus whenever the user taps a link in any app running on device. Apple has so far not reported anything on this matter.
The error occurs only on iPhone 6s and 6s Plus devices, but not on all devices.
Some users have reported that if someone uses Safari with JavaScript disabled the problem stops.
It seems that disabling JavaScript in Safari will allow you to browse the web normally, but you should know that this trick works only on the iOS browser rather than on other phone applications.
This means you'll be able to browse the web with Safari and open connections without your device freezing, but Mail apps, notes and other iPhones are very likely to continue to have problems.
Disable JavaScript
Clearly it is a temporary solution until Apple releases an update that will correct the problem.
To turn off JavaScript, go to Settings> Safari> Advanced and close JavaScript. Be sure to re-enable it when Apple releases the patch.