Hello first sorry for my english, I'm from Germany and do my best. This topic is already being discussed in various other forums but maybe someone here has an idea. My Ipad Air 2 know regardless of the installed software on a sporadic crack. Meanwhile, the unit has been replaced twice and even the third know the same problem. The pop occurs sporadically e.g. when you lock or unlock when playing videos or tap the address bar in Safari. Mainly one perceives the problem with battery charge between 90-100%. My previous Ipad Air 1 never had such a problem. The devices have been restored with Itunes and always set up as a New Ipad. ICloud disabled. The only solution to eliminate the annoying sounds is put off the keypad tones in Settings. The best way to provoke the problem is the method which is presented in my youtube video. Should there be a software problem is that every Air 2 show these problems. Has anyone of you this problem or Ipad Air2 without these symptoms?