http://www.msn.com/en-gb/money/technology/roaming-charges-in-europe-officially-scrapped-from-today-%E2%80%93-all-you-need-to-know-about-using-your-phone-overseas/ar-BBCH3sE?li=AA9SkIr&ocid=ientp
However, all is not as it seems...
Do read the article linked above because there are still places that you will be charged and quite heavily for staying in contact whilst you are abroad.