Look, they call these hackers too.
Siemens is evaluating the impact of a security bug that allows malicious hackers to crash phones by sending a malformed SMS message in Chinese. The flaw, which affects Siemens 3568i (or below) mobiles but not Siemens 6688 phones, involves a bug in the way exceptional characters are displayed. Oh great, so it takes a hacker intelect to do this? More found here