Any online device, airplane, car, laptop or smartphone can be hacked by those who know how.
In case you believe that your mobile phone Apple or Android can't be hacked by the 'authorities' then you are hopelessly naive. Ever heard of a backdoor?
Via the media you are told that your privacy is taken away from you and of course you won't protest because you probably think it is safer that way. Now 'authority' Snowden confirms that it IS possible for governmental agencies to hack which is nothing more than rubbing it in.