Because of the bug, which affects Siemens’ 3568i phones, a malicious message could shut down the phone – and would be impossible to delete without downloading additional software. On the plus side, the exploit only works for Chinese-language messages.
Bad Chinese SMS crashes Siemens mobiles
According to research firm Xfocus, many of Siemens' handsets can be crashed and effectively shut down by sending them malformed SMS messages in Chinese. Siemens has not yet produced a fix for the issue.