I have an unlocked N5 that I bought from the Google play store. I signed up for T Mobile and they put a SIM card in my phone. I'm trying to set up Tap & Pay but I get an error message saying "There was a problem loading your funding source". I've read that I should be able to do this with an unlocked N5. Any ideas why this wouldn't be working? Do I need a special type of SIM card? Is there something else I could be doing wrong?

