Apple released their 9.3 update to their operating system (iOS) last week. Since then, many people are reporting that their iPhones and iPads are freezing up or crashing.
As usual, whether you are using a Windows, Apple or Android device, it is always best to make sure that your files and apps are backed up before proceeding with an operating system update.
Better yet, unless you really love being on the “bleeding edge” of technology, I would always advise to wait several weeks before upgrading to a new OS release. Let others work out the bugs first!