The Light Phone II is offered in two models, North American and Global. Unfortunately, due to the phone’s small form factor, it was not possible to make one model that would work everywhere in the world.
The North American model will experience poor or no service in other parts of the world, regardless of having an international plan or a local SIM card. The Global model will work in many parts of the world but not well in North America. You can use our frequency checker to find out more.