Other Sim card?

[qrious]

Apparently it does work:

Any chance the project fi data-only sim cards would work?

Project fi just announced that they will let you add up to 9 data-only sim cards to an existing project fi account and share the same $10/GB data with your main plan. This would be a great way to prototype with the electron board without having to pay anything extra for the data - it says that devices need to be compatible with t-mobile for them to work. Could you use another sim in the electron? (And can you change apn settings etc)