If your iPhone or iPad is misbehaving and initial solutions are not working, a full reset may be necessary. Taking your device back to how it was out of the box can often help resolve issues like ...

Is your iPhone sluggish, crashing, or are you selling it for a new one? Then restore iPhone to factory settings beforehand.

If you've deleted an app from your iPhone but find you can't remember enough about it to find it again and reinstall it, we've got some help.

Whether your iPhone had to be factory reset, or you just snagged a new iPhone, here's how you can restore your settings and more via your phone's backup.