Read how hackers can attack your Whatsapp, Telegram and other popular Messaging apps which are using SMS authentication - all done thanks to known SS7 global mobile network vulnerability. http://www.theregister.co.uk/2016/…/10/ss7_mobile_chat_hack/
More here:
http://www.theregister.co.uk/2016/…/10/ss7_mobile_chat_hack/