answer:I’ve had the same problem with laggy applications and a weird thing happens when I get a notification. I hear the sound of the notification, then the display turns bright, and only 5 seconds later the warning for the notification shows up. Also apps crashing, Maps are terrible, and other problems like yours. I don’t think iPhone can get viruses, I just think it’s Apple having a rough time. That’s why they fired Scott Forstall, the former senior vice president for iOS… He completely messed it up!