I'm creeped out by my own phone right now, I have an iPhone 6 Plus 16 GB running iOS 8.3 and after I received that malicious message that's been going around with the Arabic characters causing your phone to crash I noticed that my phone will randomly make a "bing" sound. This bing sound is very much like a very light gong sound and it happens randomly even when the screen is off (it doesn't make my screen light up) it just randomly makes the sound and there's no notification, the sound is not any of the sounds that come preloaded with iOS, I've examined all of my apps to make sure I didn't toggle some sort of setting that may cause the sound and nothing... I restored my phone through iTunes and still it persists, it's been going on for a few days now and it's creepy. Am I the only one out there experiencing this? If not please let me know! I swear I'm not crazy or going crazy for that matter, I've looked into all of the logical explanations with no sign of the culprit.