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Caller ID not working

my caller ID is not working properly I am unable to see who is calling me when the phone screen is off . The ringtone keeps playing but there is nothing on the screen untill I unlock the phone I can't see who is calling please help..

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crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
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