Update your iPhone or iPad - Apple Support
Manage and delete contacts on your iPhone or iPad - Apple Support
Use Face ID on your iPhone or iPad Pro - Apple Support
Access Control Center on your iPhone - Apple Support
Modify files, folders, and downloads in Files on iPhone - Apple Support
Save and edit PDFs to the Books app on your iPhone or iPad - Apple Support
iPad User Guide - Apple Support (CA)
Move from Android to iPhone or iPad - Apple Support
Use Screen Time to prevent purchasing - Apple Support
How to create a new Apple ID - Apple Support
Switch from Android to iPhone 6S: How to make the move
Official Apple Support
How to move from Android to iPhone
How to upgrade and manage your iCloud storage on iPhone or iPad