So here's how to get it up and going. First you're going to have remove your credit card you have in there already.
Note, this is from Rogers' RedBoard, so it should work for them (I haven't tested as I don't have a Rogers account), and it DOES NOT work for Bell...
- Visit wallet.google.com
- Log in
- Go to “Payment Methods” and select the credit card
- Tap “Remove” and tap again to confirm
I tried doing the same for my Bell device... but no go. Maybe because I still have some Google Play credit to burn up, that they'd want to have NO payment methods available and the last resort is to use the carrier... no idea.
(*Apparently it's still not 'live for everyone' on Bell... so sit tight).