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First time it happened my phone was locked sitting in my lap, nothing lite up just made the sound, 15-20min later I plugged it in to charge and it made the sound again. Nothing ever comes up in notifications just bluooop sound! It has also happened while I have been using my iPhone, while in iMessage and other apps! I have checked every app on my iPhone and sound setting I can think of and can't figure out were it is coming from or why!!
I just noticed it today on my iPhone 4...thought I was going nuts! I went through my notifications and found several apps that had no alert styles with Badge App Icon (off) and Sounds (on). I went through and updated all the apps and turned off sounds that had these conditions. No more mysterious sounds.
I just noticed it today on my iPhone 4...thought I was going nuts! I went through my notifications and found several apps that had no alert styles with Badge App Icon (off) and Sounds (on). I went through and updated all the apps and turned off sounds that had these conditions. No more mysterious sounds.
Ok I turned a bunch of sounds off in notifications. We'll see if that works. I don't know thou there were never any notifications to go along with the sound...but hopefully that worked!
Ok I turned a bunch of sounds off in notifications. We'll see if that works. I don't know thou there were never any notifications to go along with the sound...but hopefully that worked!
If the sound is a droplet sound, check Skype. I get them on my iPad. I have installed the app but never used it, so I just deleted it. Hopefully that will take care of the random droplet sounds and hopefully that will work for you too.

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