SCMxx is a data exchange utility for certain Siemens mobile phone models.
Data types handled include logo bitmaps, MIDI files, vCalendars,
address books, phonebook entries and SMS.
Support for phones includes the following models:

 S25
 C35i / M35i / S35i
 S40
SL42 / SL45
 C45
ME45 / S45 / S45i
 S46
 M50 / MT50 / M50I
 C55
 S55

WWW: http://www.hendrik-sattler.de/scmxx/