Roaming without paying surcharges, or 'roam like at home', is for those living in Europe and who travel to other EU countries for work or leisure.
Roam like at home is meant to make communicating while travelling easier. It is not intended to allow permanent roaming where a customer would take out a subscription in the cheapest possible country and use it to roam in his home country.
Dr Emmanuel Mallia, the Maltese Minister for Competitiveness and Digital, Maritime and Services Economy, said: "When Europeans go on holiday this summer, they can enjoy the freedom of being able to stay in touch and use the internet as if they were at home. The EU is making our lives easier in very practical ways."
There is a detailed page from the European Commission answering many questions about roaming in other EU member states.