Sure, your old iPhone could just hang around in a junk drawer until the end of time, but youll want to back up whatever personal data on the device that youre not willing to part ways with. First off, if someone gets hold of your old phone, your data could fall into the wrong hands. Secondly, at some point down the line, your old phone battery could just naturally degrade, rendering your device inoperable. And not to sound scary, but if you end up dealing with a home invader, you dont want your...