Removing your personal data

• If you paired an Apple Watch with your iPhone, unpair your Apple Watch.
• Back up your device.
• Sign out of iCloud and the iTunes & App Store.
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  1.  If you're using iOS 10.3 or later, tap Settings >  [your name]. Scroll down      and tap Sign Out. Enter  your Apple ID password  and tap Turn   Off.    
  
  2.  If you're using iOS 10.2 or earlier, tap Settings >      iCloud > Sign Out. Tap Sign Out again,      then tap Delete from My [device] and enter      your Apple ID password. Then go to Settings > iTunes & App Store > Apple ID > Sign Out..
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•      Go back to Settings and tap General > Reset >      Erase All Content and Settings. If you turned on      Find My iPhone, you might need to enter your      Apple ID and password.
• If asked for your device passcode or Restrictions passcode, enter it. Then tap Erase [device].
• Contact your carrier for help transferring service to a new owner. If you aren't using a SIM card with your device, you can contact them to get help transferring service to the new owner.

When you erase your iPhone, iPad, or iPod touch, Find My iPhone and Activation Lock is turned off.

For Android devices

Each Android device has a similar process for erasing the phone and removing all personal data.

• Remove Factory Reset Protection from your device
  
  1. Remove your google account from your device. On a Samsung Galaxy, go to Settings >  Cloud  & accounts > Accounts and tap on Google, then tap the three vertical dots in the  upper right or  More > Remove account.
  
  2. If you have a Samsung Galaxy, then you should remove your Samsung account, too. To do this, go to Settings > Lock screen and security > Find My Mobile. Then, enter your password, tap on your account at the top, and select More > Remove account.
  
• Factory reset the device to erase all data - The exact method for navigating this next step will differ slightly from phone to phone. It will generally be Settings > Backup & reset > Factory data reset and then tap Reset phone or Reset device.