T-Mobile is ready for the off in Lisbon after signing a roaming agreement with Portugal Telecom Wi-Fi.
The deal will give customers wireless internet access around Portugal's airports, hotels and football stadiums throughout the Euro 2004 competition.
T-Mobile has promised that no roaming charges will be levied on its customers for the duration of the tournament.
Some 200 locations are provided, along with fast food chain McDonald's, shopping centres and a handful of bars and cafes.
Fans will benefit from high-speed broadband access to the internet at the same rates as they do in the UK, typically £1.50 for 15 minutes.
Passwords and log-ins can requested by texting 'open' to 9526 from a T-Mobile handset.
"Our new Wi-Fi availability in Portugal builds on our exclusive services for the European Championship, as well as our initiative to cut roaming rates by up to 45 per cent," said Brian McBride, managing director of T-Mobile UK, in a statement.
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