Iphone 6 iOS 8: Randomly makes noise (tri-tone). No new messages, notification, and when on vibrate mode (randomly vibrates instead of tri-tone) ect...

You should have read my response. I myself, as well as others, have already looked through every notification for every app to make sure that none are set to sound only. Also we did and upgrade from iOS7, not a setup as new phone so all our previous settings were ported over. This didn't happen in iOS7, it's happening in iOS8. And you're absolutely wrong with the operating system unable to send the signal. Everything is controlled by the operating system. Why wouldn't a bug, which is clearly there, have no ability to send a random signals? Amber Alerts is an operating system task and that sends a sound/vibrate and notification.

There are also other bugs in this version as well. This is the first time I've experience major bugs with a new iOS release not being in beta. For instance multi-gesture controls doesn't always work on my ipad, I have to keep turning it off and on. There are several others I'm experiencing with the phone and if you google it, you'll find more.

It has to be a app notifying you of something. Or. do a hard reset by holding the power button and home button at the same time until the apple logo pops up. Then let go.

OR

In your Settings scroll all the way down until you see all your apps. Click each app and unmark "allow notifications" unless you absolutely need to be notified. See if it goes away.

can't speak for everyone else here but I've done both of your suggestions figuring that it was an easy fix-neither worked to resolve my fantom vibrate

It's not an app issue....it's a bug. Bugs do not have to present in each and every iPhone out there. People who aren't experiencing this issue need to stop responding with the answer "it's a sound-only notification setting from one of your apps". We've already confirmed and re-confirmed that this is simply not true.

I understand there are several/very old message board threads similar to this where people are experiencing the same thing because they messed around with their notification settings during a non-iOS update release but this is not that. We're experiencing this immediately after and as a direct result from an iOS update.....

Same issue. Tri-tone randomly (without any notification being displayed or the screen even turning on) about every 4 hours. Woke me up twice last night. Can someone from Apple speak to this? We've gone through our notifications tediously and found nothing.

No one from Apple will respond to anything in this forum. This is a user-to-user support forum. If you want help from Apple call the support number for your country or visit an Apple store (make an appointment). What Apple will do is tell you to restore your phone and set it up as New. If the problem goes away that pretty much proves it has nothing to do with iOS 8. You then restore your apps. If it comes back it is an app.

If this were a bug in iOS, considering that millions of users have already updated, there would be thousands of posts about it. And the tens of thousands of beta testers would have noted it also. It has not come up in developer forums.

Just because it's not being reported as much doesn't mean it's not happening to others or not a bug. I have several friends that this is happening to but they're not posting anything online about it or going to the Apple Store.

I would completely agree that this is an app issue if it weren't for the fact that this started happening immediately after updating to iOS8. I even gone through all of my apps after a phantom buzz/noise to see if any of the apps had a new notification and I couldn't find any.

I have read through most of the posts and I have experienced the same phantom/mystery sound since upgrading my 5c to IOS 8. I have not background refresh on / I have removed everything from Notification Center.....

I discovered something!!!!

Under NOTIFICATIONS look at the apps under DO NOT INCLUDE....... Although the apps were listed under this category, all of them magically had Allow Notification still set as ON.

Bug, glitch, magic or fairy dust..... you decide. I have changed them. Going to wait for another 3 hours to see if the OUIJA board reaches out and pings me. Good luck.

That's very odd....there was an app in the "DO NOT INCLUDED" section that I had for a couple of years before iOS8 update set to no notification....that now has a 'sound-only' notification. I never bothered to look in that section....

Apologies to all for me not going there before posting.....but why the heck would a setting on an app be different after an iOS update? Can developers push that setting change over as an app update? Possibly as an iOS8 optimization update that we've all been receiving since he iOS update?

That's terrible if they can do that.

I Think this is not a bug but a bad feature.

When my iPhone receive a regular phone call, my iPad makes this noise. No idea why, but it must be based on an alert sent from my iPhone. Have never seen this before iOS 8.

Thanks for the useful updates, guys.

I found the same to be true. All of my apps which were previously marked *not* to "Allow Notifications" (under iOS 7) still showed up under "DO NOT INCLUDE" in Notifications setup, but were marked to Allow Notifications. Additionally, two of them were marked to play Sounds and nothing else (no banners, alerts, badges, etc). I went through and disabled "Allow Notifications" for all of the apps below the "DO NOT INCLUDE" heading. The fact that these get re-enabled is either a bug with iOS 8 itself or a bug with the restoration process in iTunes 11.4 and iOS 8. I restored all of the aforementioned apps from an iOS 7 backup of my iPhone 5 performed in the most current release of iTunes (11.4) on a Mac running OS X Mavericks.

This HAS come up in the developer's forum. Due to the obvious, I can't link to it nor the number. Possibly search next time sir. It was reported well before your 9/22 post FYI.

Same here. I upgraded my iPhone 5s from ios 7 to ios 8 and keep getting the random tritone notification without any message or banner. I checked Settings/Notifications and switched off sound in all notifications - however the problem persisted. I then found 2 apps with sound only in DO NOT INCLUDE section and switched off. Assumed the problem was gone. However the problem persisted after few hours and now I am getting these random notifications even in the middle of the night - sometimes 4 - 8 times in a row ! This is surely a bug

I'm getting this too (iPhone 6, iOS 8) and much more frequently than every few hours. I have checked all of the apps in Notification Centre (and even the ones that aren't - there were some still enabled as other users have reported) but I'm still getting the notificationless sounds.

One things though: it sounds more like the 'Hello' alert tone on mine - rather than 'Tri-tone'. Are we hearing the same sounds; might this be a way of isolating what's causing it?

Having the same issue. iPhone 5, iOS 7 upgrade to 8. Turned off all notifications. Tri-tone notification/vibrate (if silenced) going off randomly. So stinking annoying.