I just installed the interior IM app developed by my company's IT center, the way it uses to sync messages is almost common, downloads data from server and adds those conversation to client's window, and I am sure the guys who wrote this stupid thing invoked a same function like pushing message or something else, 'cause my cellphone vibrated like a Morse code machine w/ tons of Adrenaline injected when I press "Open", for almost fucking 1 minute.