I've been helping a friend with their Android phone. They have 3 different types of calendars, according to their "Business Calendar 2" app:
- Calendars synced to a Google account
- "Phone" calendar (it has 1, and no more can be added)
- "Local" calendars (it has 1, but more can be added)
What is the difference between a "Phone" calendar and a "Local" calendar, and how can one remove all the data in the "Phone" calendar?