my whatsapp calls people, if the whatsapp conversation is open and the iphone is lying upside down with its user interface on a sofa , etc. last time i woke up because i heard a ring tone. when i took it to take a closer look, i was literally „calling“ someone without having touched the smartphone. this is embarrasing and makes you look like a stupid person. should maybe get rid of whatsapp, even though it is overall great to use. whatsapp combined with ios can be a real bully!