for Lumia windows phone: can we switch between whatsapp conversations with just swipe gesture. I mean If i have whatsapp window open for a conversation, can I switch to another conversation just by sliding my finger across the screen?? I saw one of my friend doing something like this on his lumia. He was having a conversation with a friend and he just slid his finger up from the windows button and another conversation window popped up. He is not giving up on this trick. How is it possible to minimize one conversation and open other just with swipe gestures for lumia 530???