OK, I can't help myself. I almost started a new thread but decided not to. I am curious about the SIMs on the 'Travelsim platform'.
TravelSim
airbalticcard
xxsim.com
OneSimCard
Is this all of them?
OK. What are the differences? Only Onesimcard is in US dollars[& based in the US], everything else in Euros?
They all seem to have a way to get decent US rates.
Do all use both AT&T and T-Mobile for US networks?
What have been your experience if you are a user?
Any one that should be avoided at all cost??--what happened?
How well do they work in Europe?
Where do they not work?