Calling issues in samsung galaxy m31

[sureshraina1]

I have bought a Samsung galaxy m31 mobile yesterday while I trying to make a call the quality is not good and having microphone issues also any solution 

[cs_member9]

Dear Samsung Member,

Greetings from Samsung Customer Support!

Please perform the below mentioned steps to resolve the issue:

1. Check device network in open area.

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support