We noticed that in Safe mode ( Believe it or not ) that Facebook is considered a safe app! We also have all notifications turned off on Facebook as well. Our first phone was an unlocked Samsung S 10+ it was returned twice and now we have one tied to our Sorint and it's the same results. One recent find is that we have a Sprint Airave (mini cell tower for poor reception) and we found after turning it off for a couple days the beeping seems to stop and then turned it back on and we do have some beeps but not as many as before. Additionally when my wife has taken the phone outside the home we get mixed results sometimes beeping sometimes not. Of course we went to the Samsung store to have it worked on and not a single beep. So it might be the Airave but not sure And don't want to risk missing the window to return this.
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