how do i delete all calendar events rather then deleting one by one and when i push delete prior it doesnt do anything. ive got tons of events and i want to delete them all. theres got to be a faster way then one by one. same as my contacts. how can i delete all them at once. ive got a 8100 thanks

Connect to Desktop Manager > Backup/Restore > Advanced.

On the right hand side is the device databases. Click on the calendar database and below click Clear.

Same for the Address Book database, or any other.

If you just want to clear the device of ALL personal data, on the device , click Options > Security > General Settings > Menu key > Wipe Handheld.