Add-on Minutes are $50 for 50 minutes and are available for all plans except the Intro Plan. Alternatively, you can upgrade any time if you need more minutes in a given month (you can also downgrade at any time). You can buy Add-on Minutes or Upgrade by tapping on “Purchase Minutes” in the Usage or More tab. Add-on Minutes can only be bought one portion at a time, and after all existing Add-on Minutes have been consumed. They never expire and are used after your plan's minutes are used. Secondary users on the plan cannot buy Add-on Minutes.