iPhone iPhone 4 gives sporadic sounds of it.

[Mobsie]

Hi there.

I've googled already but found no solution.

My iPhone 4 does about 2-3 times a day as a sporadic sound of itself, similar to my SMS tone.
I did deactivarte all apps in the notify the center for any sounds or notifications.
Also deleted all calendars.

So what this problem be?

Many thanks in advance!

 

[Zcott]

Try restoring, or erasing all content and settings.