Sign Out of Your Apple ID
If you aren’t careful, your Apple ID account might still be open after you get rid of your older iPhone. If that happens, anyone could possibly access all your important data on your iPhone and iCloud.
Granted, there is still two-factor authentication and other security methods, but if you want to stay safe, you should sign out of your Apple ID by doing the following:
- Open the Settings app.
- Go to your Apple ID.
- Scroll down to the bottom and tap on Sign Out.
Doing a full erase on your iPhone should also sign you out of your Apple ID, but you can still do this step manually to make sure everything is cleared out and your device is removed from your account on Apple’s servers.