Luckily there is an easy fix
Here’s a simple post for newcomers to the iPhone or iPad family. You may run into an issue where your screen gets locked into one orientation, either horizontal or vertical. If you turn the device to the other direction, nothing happens.
That can be really annoying! Luckily it’s a very simple fix. If you want to unlock the screen rotation, you first go to the Home screen and then double press the hardware button. This will bring up the little task bar with all your open apps as shown below.
Now you want to swipe your finger from left to right on the bottom part of the screen. By default, this section is not shown, so you have to swipe in order to see it. It should look like this:
This screen contains the lock screen rotation button and a few music control buttons. Simply tap on the icon on the far left to lock/unlock the screen rotation. As you can see above, there is no lock icon in the circle, so currently the screen will rotate as I rotate the device. If it is locked, it will look like this:
That’s it! Now you should be able to rotate your iPhone or iPad and have the screen automatically rotate along with it. A very simple feature, but very useful! Enjoy!