My phone has service and can make calls and make and receive text messages but periodically will not receive incoming calls (service in the area is fine). I have checked to make sure it is not in do not disturb mode and the ringer is on. If I shut the phone down and restart, it only sometimes fixes the proplem. The person calling hears it ringing, next sounds like land line busy signal and then voicemail picks up but I have no knowledge of the call (if a message is left, I will get the notification of the message).
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