Network issues

[shuhaim]

Since last month ihave issue with my all calls no sound not attending calls, otp massage not coming in proper time, calls not coming etc.

Last 3 times chat with samsung service center guy

Done all test result is all ok, but issue still there.sim card also changed then no good result. 

[SamsungTec]

Reset your device after backup

[Samsung_specialist]

We would like to apologize regarding this frustrated issue. However, kindly make sure that the device is updated to the last software update. If you've done all the reset settings we recommend checking the case in one of the authorized service center directly.