If your phone screen doesn’t respond when you touch it or frozen while using some applications etc.,you can force restart your phone to solve A force restart won't erase the content on your phone except those are broken or invalid.
Press and hold both the Power and Volume Up buttons for at least eight seconds, until the phone is turned on.
If you cannot force restart your phone, plug in your phone with the original charger and let it charge for up to 30 minutes, then try again.If the problem persists, You need totake your phone to a nearby realme Service Center for repairs.