What is the best SIM Card to buy?

[Hal-9000]

SIM cards confirmed to work with r1

Hey all - thought it would be good to have a post with SIM cards confirmed to work on r1. If you are using one that works, reply in this thread and I’ll add it to this list. If something is not on this list that does not mean it does not work, just that nobody has reported it here yet. Everything on this list has been confirmed to work either by the team or a community member. UK SMARTY Three GiffGaff Vodafone EE Lebara USA Ultra Mobile Tello Google Fi T-…

Go here list of SIM card know to work in each country