Known tool for tuning siemens phones:

You can download it from new PEP home page here (http://www.phoneeditorpro.de/index.php?file=download) (attention, that's new installer for PEP).

And for those who dont dont want pay ;) download crack for PEP2000 175 from here (http://www.andr.net/)

Installed today and works fine with support m(t)50
Bye.