How do I change the Onoff number associated with one of my contacts?

- If you have an iPhone:
From the home screen, go to the “Contacts” tab
Choose the one you are interested in (you can use the search function),
Then tap "Associate to profile" and select a category.

- If you own an Android phone:
From the home screen, go to the “Contacts” tab.
Choose the one you are interested in (you can use the search function),
Then tap "Associate to profile" from the menu at the top right and select a category.