7 of 7 ~ Things Your Phone Does That You Don't Understand, Explained Your phone can say 100% and still not be full. It can find you without a signal, dim the screen in bright sunshine on purpose, and slow down the last few per cent of charging deliberately. Here's what's actually going on inside the phone in your pocket. Chapters 0:00 Battery health 1:30 Fast charging 2:37 GPS 4:05 Auto brightness 5:19 Wireless charging 6:36 Screen rotation 7:41 Vibration and haptics 8:38 The camera - @thom.code