My red rice NOTE5, how to solve it without ringtone?

Red Rice NOTE5 mobile phone doesn't ring, so it may have turned on do not disturb mode. The shutdown steps are as follows:

1. Open the interface of Red Rice NOTE5 mobile phone, find the setting icon on the desktop of Red Rice NOTE5 mobile phone, and click Enter.

2. After entering the setting interface of Red Rice NOTE5 mobile phone, click to enter sound and vibration.

3. Click to enter Mute/Do Not Disturb after entering the sound and vibration interface of Red Rice NOTE5 mobile phone.

4. After entering the mute/Do Not Disturb interface of Red Rice NOTE5 mobile phone, you can see that Do Not Disturb is turned on at this time.

5. Click to turn off the Do Not Disturb mode, and the phone will ring.