Police siren slert - samsung s10

[Loobs40]

A couple of weeks ago out of nowhere what's best described as a police car siren alert started sounding on my phone for four cycles at a time.

I have since noticed it goes off every 20 minutes exactly, three times an hour, although not every hour of the day.

It's extremely intrusive but I can turn down the volume.

I have checked every notification setting on every app, gone through every possible system setting but cannot find from where it is originating. I have rebooted, installed the latest system update, all to no avail.

I work in IT so consider myself fairly knowledgeable but this is defeating me. I can find no other reference to this on Internet.

Any ideas, please??

 

[B. Diddy]

Welcome to Android Central! Try using Nice Catch from the Galaxy Store and see if that comes up with anything.

Also, does this happen in Safe Mode as well?

 

[Loobs40]

Thanks. I've installed nice catch. Will wait to see if that produces anything before trying safe mode

 

[mustang7757]

Can also see if you have notification reminder on , or in setting>notification> what's the last app to give notification when it goes off .

 

[dpomerance]

Sounds like one of those alerts that are sent out by the local authorities

 

[Loobs40]

Sadly Nice Catch doesn't catch it. Do next step is safe mode.

Is there a simple way of identifying which apps I have installed in say, the last month?

 

[Loobs40]

Found it! NHS Responder. Goes off when there is a request. Except in the 4 months I've had it never had any requests until clearly a few weeks ago. Odd that there was no other notification or pop up!

 

[mustang7757]

Found it! NHS Responder. Goes off when there is a request. Except in the 4 months I've had l clearly it never had any requests until clearly a few weeks ago. Odd that there was no other notification or pop up!

That's great you found the problem

 

[B. Diddy]

Found it! NHS Responder. Goes off when there is a request. Except in the 4 months I've had it never had any requests until clearly a few weeks ago. Odd that there was no other notification or pop up!

Great! How did you figure it out?