like a problem, but Apple has re-arranged its filing system. Just an extra caution: Make sure you backup your i Phone before updating to i OS 10.3.Apple File System (APFS) replaces the older HFS way of arranging your files, and now it's optimized for flash and SSD storage. We haven't experience problems, but you never know.
All have been made available to i Pad & i Phone users for free (assuming your device is a recent enough model to qualify).Rei Boot and Rei Boot (Mac) enables you to fix i OS freeze, i Phone crashed during i OS 10/9 update, Recovery Mode stuck, DFU stuck, red i Tunes logo stuck, etc. Then Rei Boot will automatically detect the condition of your i Phone.You can either click "Enter Recovery Mode", "Exit Recovery Mode" or use both according to the detecting result to reboot your i Phone.You can also use these tricks if your i Phone stuck in Recovery Mode (red i Tunes logo)/reboot loop during updating to a new i OS version and if your i Phone is working fine and suddenly it freezes. Keep pressing the Home (Volume Down button for i Phone 7 and i Phone 7 Plus) and the Power button simultaneously until the Apple logo comes back on again.As we all know, restarting your i Phone seems to be an omnipotent trick to solve most minor problems on the first try. Then release both buttons and your i Phone should boot up successfully and work normally.