History proves it again:

it's not a simple task for company to release phone in US.

Not even big company such as Nokia who did not release N9 in US

And Jolla did not even consider release phone in US.

For two years ago I worked as consult for a upstart company. We did a GSM consumer product that should be launched in EU and US. AFAIK that company still has not released product in US...

AFAIK US has plenty of rules that must be applied before one can launch product in the US.