There's no charge for receiving calls or texts while roaming in any of the countries listed in our Euro Zone. Full directory of countries, here: https://guides.plan.com/pro-europe/
If you are roaming outside our Euro Zone, there will be charges for receiving calls, and for using mobile data.
Visit https://www.plan.com/pricing for full details.
Did you know it's possible to prevent incoming calls, from the dashboard of your my.plan account?
CONTROLS > DATA, CALLS & TEXTS > INCOMING & OUTGOING CALLS > INCOMING CALLS > [select user] > ALLOWED/BLOCKED