Restart phone:
Your phone is unable to receive calls due to minor Android glitches. An easy way to deal with this problem is to reboot your phone. By doing this all the services of your phone are stopped and it helps in rebooting the phone. In such a situation, whenever this problem occurs in the phone, then you should restart or reboot the phone.
Flight Mode:
If even this does not solve the problem of the phone, then you should also try flight mode. This is because flight mode disconnects your phone from your cellular network. In this case, your problem can be solved by this.
Network Area:
Many times we forget to check whether our phone is in the network coverage area or not. So make sure that you are in the network coverage area. Your phone must be in your phone coverage area to receive incoming calls and make outgoing calls.
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