Malicious caller identification
(重定向自Malicious Call Trace)
Malicious caller identification, activated by Vertical service code Star codes *57, is an upcharge fee subscription service offered by telephone company providers which, when dialed immediately after a malicious call, records meta-data for police follow-up. Remember to file a police report for each use - law enforcement will only act on the trace once a formal police report is filed in regard to the call.