You will have to go to Settings then tap on General and finally click on Transfer or Reset iPhone. How to wipe all content and settings from iPhoneġ. If you are unable to open Settings, you can use a computer too in order to erase iPhone. Also, if you want to save your content and settings, back up iPhone before erasing it.

To remove all of your content and settings from storage you will have to erase iPhone. It can be noted here that when you delete data, it is no longer accessible through the iPhone interface, but it is not erased from iPhone storage. When the device is next powered up, the Setup Assistant will guide the user through the setup process.Are you planning to switch to a new iPhone or sell your iPhone to someone? If yes, you need to ensure that you erase all your login details and other data.

There is no recovery possible - apart from reloading from a backup - after this step. If you are asked for your passcode or restrictions passcode, enter it and then tap Erase iPhone.

If you have Find My iPhone enabled then you may need to enter your Apple ID and password. Go to Settings > General > Reset > Erase All Content and Settings. Tap Sign Out again, then tap Delete from My iPhone (you will be asked to enter your password).

You will be asked to confirm the action.

Tap Settings > iCloud and then scroll down and tap Sign Out. You can do this by connecting the iDevice to a PC or Mac with iTunes installed, or to iCloud (iOS 8 users can check the status of this at Settings > iCloud > Backup, while iOS 7 or earlier users need to go to Settings > iCloud > Storage & Backup).

Next up, you need to backup your data.

If you have an Apple Watch paired to your iPhone, you will need to unpair it using the Watch app.

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