I got my iPhone 6s and transfered content from my old iPhone 5 by following Apple Support HT201269, and backup my iPhone 5 with iTunes. After I restored the backup to my iPhone 6s, it's seemed that 6s was reinstalling all my 3rd party Apps and restored its user data with Internet.
There are several questions that confused me:
- Where is my Apps user data saved? In my iTunes backup or in my iCloud automatically? I found that all Apple's applications restored their data including settings, and some of 3rd Apps restored their user data, but some not. How does iTunes backup my all 3rd party Apps?
- Whether or not I click "File > Devices > Transfer Purchases.", it seemed that iTunes backup would not save any app, and will re-download them from App Store after iOS restored. But I can find all my App backup in iTunes, it doesn't make any sense at all.
- How can I backup all my Apps and all their user data from old iPhone to the new one? if I need always connect usb cable when iPhone re-download Apps?