Leave a group plan or remove members
Your Project Fi group owner and managers can remove members from your group, and each member can leave your group at any time. When you decide to leave or someone removes you from your group, you'll have different options to choose from, including joining other groups, creating your own Project Fi account (if you're over 18 years old), or porting out your number to Google Voice or another carrier.
Group owners and managers are not able to manage phone numbers on behalf of members. If you have been removed, you will have 60 days to port out your number, or it will automatically be released. Your group owner will be responsible for any pending charges prior to your leaving/removal.