VisorCentral.com (http://discussion.visorcentral.com/vcforum/index.php)
- Springboard Modules (http://discussion.visorcentral.com/vcforum/forumdisplay.php?forumid=10)
-- dont need a modem with siemens s25 phone (http://discussion.visorcentral.com/vcforum/showthread.php?threadid=5074)

as far as i�m informed you don�t need a modem for your visor if you use a siemens s25 cellular. the s25 has an IRDA-port and a modem on board. it works with a palm. see:http://www.palmos.com/info/discussion/messages/1546.html