This is the feedback I received from Furioos -
"It has nothing to do with server location, i can use an application, on east US server and i’m located in France, you don’t to need be in the country to use Furioos. (edited)
What do you mean by cannot use your App ? The app doesn’t start, the latency is high ?
Are they on restricted network ?
Your user can use the faq on our new support website to test bandwith - https://support.furioos.com/faq/
They also need to check if they use a browser supported by Furioos.