Please help

[suhasinimakireddy]

When calling with sim1 the sound is not coming and   not going

[RαʝҽʂԋKυɱαɾ21]

RESTART[REBOOT] YOUR PHONE ONCE AND CHECK AGAIN!

[VedantKalore]

Please check if SIM card is inserted properly in the dedicated SIM card slot.
OR
If SIM card is active/inactive
OR
Reboot the device
OR
If nothing works contact Samsung support through samsung members app.