Make sure your headset and the mobile are within 10 meters range.

Music Online make sure the internet connection is stable

Select the streaming quality to the maximum for better sound quality

Check for the streaming quality.

• On mobile tap on the Music player
• Tap Settings
• Tap Streaming Quality
• Select HD or the High

Distortion on Music or calling: calling: Normal or Online: Normal call: Network issue 

• Wi-Fi calling off if still issue persist go for Reset and if not resolved go for RPU.
• Music Online: Change network/ Wi-Fi and check still issue persist check streaming quality and Reset Post that if issue persists go for RPU.