0.5€ per day for unlimited data here in Europe, heck Poland has 5€ per month for unlimited everything can't wait for end of roaming charges, even if they limit

0.5€ per day for unlimited data here in Europe, heck Poland has 5€ per month for unlimited everything can't wait for end of roaming charges, even if they limit no fees for like 3 months per year abroad it's worth just switch SIM every three months only because of data, even if you will use secondary card for calls and SMS so people can reach you on same number