Answer from a MS Coworker:
No, CoMo 2007 does not change the presence state if you use your mobile phone to make a phone call. CoMo 2007
is not integrate to the mobile phone on that level. However if you click to call one of your contacts it will use your
GSM stack or equivalent to make the call.
My tests confirmed it (different Windows Mobile 5/6 based T-Mobile PDA's, data connection with GPRS). Does anyone get different results?
Best Regards,
Joerg