71 countries included with THREE.co.uk sim cards

Austria

Australia

Belgium

Brazil

Bulgaria

Channel Islands

(Includes Jersey, Guernsey, Herm and Sark)

Chile

Croatia

Colombia

Costa Rica

Cyprus

Czech Republic

Denmark

El Salvador

Estonia

Finland

(includes Aland Islands)

France

(Including Corsica, Mayotte and Reunion)

French West Indies

(Including French Guiana, Guadeloupe,

Martinique, Saint Martin, Saint Barthelemy,

Les Saintes, Marie-Galante and La Desirade)

Germany

Gibraltar

Greece

Guatemala

Hong Kong

Hungary

Iceland

Indonesia

Isle of Man

Israel

Italy

(Including Vatican City, Sardinia and Sicily)

Latvia

Liechtenstein

Lithuania

Luxembourg

Macau

Malta

Netherlands

New Zealand

Nicaragua

Norway

Panama

Peru

Poland

Portugal

(Including Madeira and the Azores)

Republic of Ireland

Romania

San Marino

Singapore

Slovakia

Slovenia

Spain

(Including the Canary Islands and Balearic

Islands)

Sri Lanka

Sweden

Switzerland

Uruguay

United States

(including Hawaii, Puerto Rico and US Virgin

Islands)

Vietnam