Please follow the below mentioned steps in order to resolve the issue:
> Kindly connect your device with high speed wireless connection.
> Perform the reset network setting (Go to the settings>>general management>>reset>>reset network settings).
> Once check with another SIM card.
> Once coordinate with your network service provider.
For further assistance, kindly visit the nearby Samsung service center for the physical inspection of the device. The address details of Samsung Service Centers are available at our website. Please click on the link mentioned below to get more information: