Hi there,

so this is known as a transfer of ownership  (TOWN) of your phone number. To do this, you will have to schedule a call back with a rep. When you do, they will want to perform a credit check on the person leaving the account, ask permission from the account holder to do the transfer, and then after will switch you to your own account. For more information feel free to check out the link below 

Note: to do this there is a $50 service fee for the transfer which will be put on your account for the next bill. If you’re still in a 2 year term, the tab will either be transferred if you meet a certain credit criteria or you will be billed the remaining balance of the tab on your next bill.

https://www.koodomobile.com/en/help/transfer-of-ownership-town