Hi
I just got a HTCS710 Windows Mobile 6 and as can be forund in the X5 World it does not connect on the BMW X5 phone. But when I installed the Jetware program it connect and transfere the phone book as well as Outlook mails/SMS.
The program is easy to install and there are a 30 days trial periode. But it is less than $15 so nobody should be ruined.
I found it easy to install wia the phone internet explorer http://www.jetwaremobile.com
Go to install and select the phone operation system (Windows Mobile 5 and 6, Smartphone or Pocket PC) and wola its done. You than can access the setup in the programs and do the settings you want.