This feels like a fairly stupid question but I can't seem to find the answer…
I bought a Japan eSIM from mobimatters and their recommendation is to install that eSIM 1 or 2 days before leaving for Japan. Their website also mentions that the eSIM will activate immediately after installation. My questions is: during those 1 or 2 days, will I be able to use my own providers data plan, or will it start using the eSIM data? If yes, will this eSIM for Japan work in Europe where I live?
There must be a lot of people who have been in this situation, what happened when you installed the eSIM before your flight?
by momentumiseverything