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Help charging blocks screen

kroksis

Lurker
When I connect my s3 to charger, the screen starts to act very strange: it is impossible to enter the pattern or PIN, and screen remains blocked when receiving calls. This problem started a week ago, before that I used my phone for a year without any problems. Android 4.1.2, not rooted. It started when I connected to internet, so I thought it could be a virus or a hacker, but avg, avast and lookout did not find anything bad.
 
Welcome to the forum kroksis.

Have you tried a different charger? I had a similar problem which was due to a faulty charging cable.
 
When u look in security settings, have any apps been granted admin rights there that could be causing it?
 
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