These handheld computers are prone to hacker attacks and various malware infections due to the lack of necessary security and anti-viral functions and features from the gizmo's operating system. Plus, the operating systems of these gadgets have not yet fully configured security measures when it comes to its bluetooth connectivity function. With a bluetooth-enable handheld device, hackers could easily crack their way through your operating system's weak security barrier. In addition, various malware are now designed to go around weak firewalls and other barriers so as to infect your system.