Damn, I was hoping to find definitive information on this issue. Yesterday this exact problem started for me so I tried tracking my phone looking for patterns of conditions: battery level, WiFi, apps running, apps installed, signal strength and type (4G/3G) and I have found nothing. While charging it seems to sound off at every 10% increment but while discharging, no patterns are showing. I suppose I'll do a factory reset and get back to you on the result kadidle. Damn all ghosts in the machine!!!!!:icon_evil: I forgot to add the most crucial information: known changes. I spent a few minutes looking at the apps I have no use for and tried to uninstall some of the factory mandatory (<---which is b.s.) apps. Before, I was constantly bothered to update these so eventually I caved because the notifications were pissing me off. Maybe, the phone is trying to tell me "updates available" but due to my deleting, the text is failing just as someone mentioned their apps were doing while the device was plugged in. I went to Play Store and selected Slacker Radio, since I knew for a fact I tried to delete that app from the Settings->Apps menu. When I uninstalled in from Play Store, I rebooted and the first thing that happened was I got a text from Gold's Gym (membership cancelled 16 months ago during the 4 year membership never received a single text) and Slacker Radio started updating itself automatically. This was roughly 10-15 minutes ago and I have yet to see a phantom notification. I shall whine more if it happens again, but I recommend trying this before a factory reset. If you're anything like me, it takes some time to modify factory settings back to my settings, not to mention re-downloading the apps I frequently use. Btw I am fully aware of the mandatory apps workaround through rooting. No wise guys please.