This article explains how to enable and disable screen locking on devices running iOS 4 and up. It's broken down by iOS version and covers the ways to tell if screen locking is enabled. What if you ...

Check if the Portrait Orientation Lock is on; it stops the iPhone screen from rotating. Open Control Center and tap the lock icon to turn off rotation lock if it's active. Some apps don't rotate; test ...

Since the launch of the very first iPhone, every single model that followed — not to mention just about every other smartphone in existence — has had a rotating screen feature. It's simple in its ...