My iPhone stopped rotating
When I turned my iPhone 5S sideways, it switched from portrait to landscape. It stopped doing that. How do I get it to resume?
Make sure you have rotation enabled.
If the screen doesn't rotate on your iPhone, iPad, or iPod touch - Apple Support
Take a look at this article:
Get help with hardware features on your iPhone, iPad, and iPod touch - Apple Support
You can also try these steps: This won't delete your data stored on the phone.
- Press and hold the Sleep/Wake button
- Press and hold on the Home button
- Keep holding both buttons until the display turns off and back on with Apple logo on it.
Alternatively, you may go to Settings - General - Reset - Reset All Settings