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Help intermittent one-second buzzing sound

I don't recall hearing anything like that if an app was not involved in producing it.

I suggest that you go into App Mgr and go thru the list of all Downloaded apps first, and turn OFF notifications on everyone of them.

The see how that effects the phone over the next 24 hours or so. Then, IF you really need a notification, just turn on that one... that is how I have my phone set up... SMS is the only notification I allow on my phone.
 
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