*Note: Different iPhones have different erase and reset procedures
How to reset and erase all data from an iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6s, iPhone 6 Plus, iPhone 6s Plus.
How to reset and erase all data from an iPhone 7 and iPhone 7 Plus.
How to reset and erase all data from an iPhone 8 and iPhone 8 Plus.
How to reset and erase all data from an iPhone X.