It also supports encryption as a primary feature.The iOS 10.3 targets all iOS 10 compatible devices: the iPhone 5 or later, iPad 2 or later, iPad mini 2 or later, iPad Pro range and the 6th generation iPod touch or later. APFS is designed to be low latency, this should also improve read and write speeds on iOS. Beta testers of iOS 10.3 reported seeing more storage available after the update, primarily due to the way APFS calculates available data.Because Apple is taking on a big task to silently update millions of iOS devices’ file systems things will take a little longer than normal. Usually, the users will be prompted to update. If that hasn’t happened it can be triggered manually by going to Settings > General > Software Update. there are some isolated reports in Apple Support Communities about failed updates and Bluetooth connectivity issues.