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Android Central Question
All incoming calls from any number in the contact list are blocked with no ringing, no incoming call screen, nothing but a missed call indication. Private numbers or numbers not appearing in contacts are not blocked and ring through normally. Do not disturb, airplane, and call forward are off and ringer is at max vol. The problem only affects incoming calls from numbers that are in the phone's contact list. Once a number is removed from contacts it is no longer blocked and incoming calls from that number ring normally. As soon as the number is restored to contacts it is blocked again. Any idea what could be causing this?