Need help, I’m lost.

[Gix1k]

My phone makes a notification sound and vibrate every 20 secs or so at random times and I cannot figure out which app it is.
I’ve turned sound off in notifications for all apps. I’m not getting a badge icon on any random app. I’ve begun deleting things like FB, Twitter, etc and leaving off until I hear the sound again, then I reinstall it. I’ve been dealing with this for months. I don’t want to restore this backup to my upcoming IP14 and keep dealing with it.
Any advice as to how I can figure this out? The noise is not a native iPhone sound.

 

[BugeyeSTI]

Restore and setup your phone as new and not from a backup. Then add the apps you need one by one until you find the app that's causing the issue. I'm surprised nothing shows up in your notification center if your getting notification sounds..

 

[Banglazed]

Had this issue when restoring from a backup in the past also. Since then, I’ve set it up as new. Manually download the apps I’ll use and sign in to them. If you used iCloud backups, it will resync after signing in.

 

[Gix1k]

I really hate to start new again, but if that’s the answer then I’ll have to do it.
Yeah, there’s nothing in Notification Center, badge…nothing! As frequently as it’s doing it I figured it would be easy to find. Nope!

 

[antiprotest]

Research it more before restoring. I disagree with how so many people jump to that so early, some even as a first option. It should be a last resort, or even a never resort. Stop listening to nuclear suggestions like buy a new iPhone, switch to Android, change your phone carrier, move to another country, transport to another dimension, reincarnate -- or set up phone as new.

For example, a very quick search on Google just now has somebody narrowing it down to a problem with bluetooth. Then he deletes the device in bluetooth settings that seems to be associated with the problem and the notifications stopped. That might not be your problem, but if it could be something this quick and easy to solve, you'd be a chump for doing a whole restore.

 

[Gix1k]

Has anyone heard this sound before?

 

[arw]

As something is doing something in the background, maybe it also uses enough battery to be listet high enough under "Settings > Battery" and helps you narrowing it down?