IPhone sounds: my phone make a two tone sound

[California_Republic]

My iPhone makes a two-tone sound all times a day and night. About every couple hours. I’ve gone through all my apps and turned off sound. I cannot figure out what this is. There’s no indication that an alert has come through from any of the apps.

Sounds like a doorbell sound high tone Low tone but sort of synthesized. Any help is welcome

[matt819]

1. Have you checked all your notifications?

You mentioned you turned off sounds in your apps. But there could be app notifications that are beeping at you.

[California_Republic]

3. Thanks

[The Velveteen Ocelot]

2. Is it alerting you to a received email or a calendar event?

Go through the alerts and notifications in settings if you haven't yet - there might be something going on there.

[California_Republic]

4. Thanks

[Tetrachloride]

5. my common notifications

Mail
Facebook
WhatsApp
notifications within browser such as for RawStory.com, programmable notifications from my favorite utility Keyboard Maestro
Facetime

hope this helps