Originally Posted by Andi
Settings - Options - Device - Advanced System Settings - Default Services
In the Torch you can do it two ways:
The "old fashioned way", it it now:
Tools / Device / Advanced System Settings / Default Services,
Or the "new and smart way":
Type the word Default in the universal search, and it leads you to Default Services, that offers you the options to define the default Calendar, Contacts, Messaging.
I hope this works for you.