
It also installs the latest version of the operating system," Apple's Support page informed.

This includes removing any apps that were installed without your knowledge and resetting your privacy settings so you aren't sharing location with any people or apps.

A factory restore erases the information and settings on your device. "If you're concerned someone may have had physical access to your device and tampered with its built-in security, you can restore the device to its factory settings - even if you aren't using the latest version of iOS. If you are an iPhone user, you can know that when you delete data, it is no longer accessible through the iPhone interface, but it is not erased from iPhone storage. Even if you put your device on exchange, you need to clear your phone. When you plan to switch or buy a new phone, it is always advised that you erase all your personal details from your old smartphone before giving it to someone else.

From your pictures, chats, login details to bank and financial details- everything is there on your device. Your smartphone stores a lot of crucial information.
