Icelandic phone number is not accepted while booking seats online.
Solved
Phone number not accepted while booking seats online.
Best answer by rvdborgt
What reservation (route, date, departure time) are you trying to book where?
If it's on the Interrail website, then have a look at this page and follow the advice:
https://www.seat61.com/interrail-and-eurail-reservations.htm
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