Siri-ous Trouble? Hacker Cracks iPhone Lock Screen[ Mon, 05 May 2014 23:06:43 GMT ]Siri needs to brush up on her security. Using voice commands, one hacker claims it's possible to bypass the lock screen of an iOS device running version 7.1.1, access that phone's contacts list, and call a contact from the bypassed phone.The hack has its limitations.