Whether you need to make the change or want to leave physical SIMs behind, you can likely do so with just a few steps.

This extensive iPhone user guide includes full instructions on how to use your iPhone. If you're looking for a traditional manual, this is it. Apple produces a new version for every major iOS release.

Unsure which version of iOS your iPhone can run? Here’s a quick guide so you can find out if your iPhone is compatible with the most recent iterations of the iPhone operating system, and, if it ...