I dont see a option to upgrade my phone. Only gives option to buy galaxy s8 + with a new tab and plan. Or to swop my phone for another one.
I want my number my plan but to buy galaxy s8 + on medium tab
Go to koodomobile.com
Sign into your self serve account
Go to shop->phones
Click the pre-order button for the S8+
You will be asked if you want to add a line or get a new phone
Choose new phone