1. Check your phone’s settings to ensure auto-rotate is enabled.
2. Restart your phone and try again.
3. If the issue continues, check if your phone’s software is up to date.
4. If not, back-up your data and upgrade your software.
5. If the issue persists, check if your phone’s sensors are working correctly.
6. Depending on your phone’s model, potentially replace the sensors.
7. If the sensors don’t work, the best option may be to replace the screen.