for 2 weeks we will be in London and Paris. Flying in London.
is there a sim card that we can buy at airport at Heathrow or here in US that will work in both places. we want to mainly use it for google maps/ train schedule/whatsapp.
We have iPhone 6 and it is unlocked.
yes, most sims will allow roaming throughout the EU as part of the base plan. For the moment. Likely after any Brexit if or when it ever happens. But nobody knows.
When are you travelling? Soon or next year?
EDITED: to add - I see that this question was answered for you in a different thread several days ago. Is there something in those answers which was left unanswered or unclear?
Next week.
