Selling or trading in your iPhone? 5 things you must do first

Here’s a common scenario. You’re at the Apple Store or other retail outlet buying a new iPhone but you want to save money by trading in your current phone. Ahh, but you could run into a few obstacles.

Also: Best iPhone now: I compared the top models and found the best options for you

Maybe you’ve forgotten to back up your phone. Or you’ve neglected to erase all your personal data. Maybe you haven’t turned off the Find My service, or disabled Stolen Device Protection. You see the…