How to resolve regular unknown alert despite changing 3 mobile phone models?

[Android Central Question]

After switching out of Huawei P30 to a new android phone, I experienced chiming alerts regularly (weekly) and I've gone through all my apps and I can't find the source. Deleted or stopped all notifications including NFC but the alert (Ding ding ding) keep coming regularly. I switched to another phone. Did not copy any app or info, download every app one by one and the same problem came back! This is the 3rd android phone I am switching to and I've also changed to a new SIM card, gone through all the apps and it still chimes. Never had this problem for past decades until I switch out of Huawei. The only similar action I did for each new phone was to sign in with my google account and sync.... could it be some umknown google backend alert? This is driving me crazy!!!

 

[mustang7757]

Have you tried safe mode ? What is your current device?

I'll leave a Link to register so you can communicate here , As a guest account you can only post questions but can't reply.
https://forums.androidcentral.com/showthread.php?t=409154

 

[B. Diddy]

Welcome to Android Central! It's almost certainly due to something you installed (either purposely or unwittingly). Safe Mode can help narrow things down a bit -- if it doesn't happen in Safe Mode, then you know it's something you installed.

Are the 3 tones the same or different? Does it sound like the old "NBC" jingle?

 

[belodion]

If you don’t respond, we can go no further.