Discover the best Three SIM-only unlimited data plans in the UK. Whether you’re streaming, gaming, or browsing, these plans give you complete freedom without worrying about running out of data.
Why Choose Three for Unlimited SIM Plans?
- Unlimited Data: Stream, browse, and game without restrictions.
- 5G & 4G Network: Fast speeds across the UK.
- Flexible Contracts: 12-month plans or rolling contracts depending on your needs.
- Extras: Go Roam in 71 destinations, no hidden fees, and data sharing options.
- Customer Support: Highly rated service with easy plan management online.
Top Features of Three Unlimited SIM Plans
- eSIM available for instant activation.
- Unlimited calls and texts included.
- Compatible with all unlocked phones.
- Easy upgrade or plan changes anytime.
- Access to Three’s 5G network at no extra cost.
Compare All Three Unlimited Data SIM Deals
Below is our handpicked list of all current Three unlimited SIM plans.
163 Roaming Destinations
12GB
🇦🇽 Åland Islands (Finland)
🇦🇹 Austria
🇵🇹 Azores (Portugal)
🇪🇸 Balearic Islands (Spain)
🇧🇪 Belgium
🇧🇬 Bulgaria
🇪🇸 Canary Islands (Spain)
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇮 Gibraltar
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira (Portugal)
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Réunion
🇷🇴 Romania
🇧🇱 Saint Barthelemy
🇫🇷 Saint Martin
🇸🇲 San Marino (Italy)
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇸🇪 Sweden
🇨🇭 Switzerland
🇻🇦 Vatican City
🇦🇺 Australia
🇧🇷 Brazil
🇨🇱 Chile
🇨🇴 Colombia
🇨🇷 Costa Rica
🇸🇻 El Salvador
🇬🇹 Guatemala
🇭🇰 Hong Kong (China)
🇮🇩 Indonesia
🇲🇴 Macao (China)
🇳🇿 New Zealand
🇳🇮 Nicaragua
🇵🇦 Panama
🇵🇪 Peru
🇵🇷 Puerto Rico
🇸🇬 Singapore
🇱🇰 Sri Lanka
🇺🇸 United States of America (USA)
🇺🇾 Uruguay
🇻🇮 U.S. Virgin Islands
🇻🇳 Vietnam
🇦🇱 Albania
🇦🇩 Andorra
🇦🇬 Anguilla
🇦🇬 Antigua and Barbuda
🇦🇷 Argentina
🇦🇲 Armenia
🇦🇼 Aruba (Netherlands Antilles)
🇦🇿 Azerbaijan
🇧🇸 Bahamas
🇧🇭 Bahrain
🇧🇩 Bangladesh
🇧🇧 Barbados
🇧🇲 Bermuda
🇧🇴 Bonaire (Netherlands Antilles)
🇧🇦 Bosnia and Herzegovina
🇻🇬 British Virgin Islands
🇧🇳 Brunei
🇧🇫 Burkina Faso
🇰🇭 Cambodia
🇨🇲 Cameroon
🇨🇦 Canada
🇰🇾 Cayman Islands
🇨🇳 China
🇨🇼 Curaçao (Netherlands Antilles)
🇹🇷 Cyprus, North (Turkey)
🇨🇮 Côte d’Ivoire (Ivory Coast)
🇩🇲 Dominica
🇩🇴 Dominican Republic
🇪🇨 Ecuador
🇪🇬 Egypt
🇫🇴 Faroe Islands
🇬🇦 Gabon
🇬🇪 Georgia
🇬🇭 Ghana
🇬🇱 Greenland
🇬🇩 Grenada
🇬🇳 Guinea
🇬🇾 Guyana
🇭🇹 Haiti
🇭🇳 Honduras
🇮🇳 India
🇯🇲 Jamaica
🇯🇵 Japan
🇯🇴 Jordan
🇰🇿 Kazakhstan
🇰🇪 Kenya
🇽🇰 Kosovo
🇰🇼 Kuwait
🇰🇬 Kyrgyzstan
🇱🇷 Liberia
🇲🇬 Madagascar
🇲🇼 Malawi
🇲🇾 Malaysia
🇲🇽 Mexico
🇲🇩 Moldova
🇲🇪 Montenegro
🇲🇸 Montserrat
🇲🇦 Morocco
🇲🇲 Myanmar
🇳🇪 Niger
🇳🇬 Nigeria
🇲🇰 North Macedonia
🇴🇲 Oman
🇵🇰 Pakistan
🇵🇾 Paraguay
🇶🇦 Qatar
🇷🇼 Rwanda
🇧🇶 Saba (Netherlands Antilles)
🇰🇳 Saint Kitts and Nevis
🇱🇨 Saint Lucia
🇻🇨 Saint Vincent and the Grenadines
🇸🇦 Saudi Arabia
🇸🇳 Senegal
🇷🇸 Serbia
🇸🇨 Seychelles
🇧🇶 Sint Eustatius (Netherlands Antilles)
🇧🇶 Sint Maarten (Netherlands Antilles)
🇿🇦 South Africa
🇰🇷 South Korea
🇸🇷 Suriname
🇹🇼 Taiwan
🇹🇯 Tajikistan
🇹🇭 Thailand
🇹🇹 Trinidad and Tobago
🇹🇳 Tunisia
🇹🇷 Turkey
🇹🇨 Turks and Caicos Islands
🇺🇬 Uganda
🇺🇦 Ukraine
🇦🇪 United Arab Emirates (UAE)
🇺🇿 Uzbekistan
🇿🇲 Zambia
163 Roaming Destinations
12GB
🇦🇽 Åland Islands (Finland)
🇦🇹 Austria
🇵🇹 Azores (Portugal)
🇪🇸 Balearic Islands (Spain)
🇧🇪 Belgium
🇧🇬 Bulgaria
🇪🇸 Canary Islands (Spain)
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇮 Gibraltar
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira (Portugal)
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Réunion
🇷🇴 Romania
🇧🇱 Saint Barthelemy
🇫🇷 Saint Martin
🇸🇲 San Marino (Italy)
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇸🇪 Sweden
🇨🇭 Switzerland
🇻🇦 Vatican City
🇦🇺 Australia
🇧🇷 Brazil
🇨🇱 Chile
🇨🇴 Colombia
🇨🇷 Costa Rica
🇸🇻 El Salvador
🇬🇹 Guatemala
🇭🇰 Hong Kong (China)
🇮🇩 Indonesia
🇲🇴 Macao (China)
🇳🇿 New Zealand
🇳🇮 Nicaragua
🇵🇦 Panama
🇵🇪 Peru
🇵🇷 Puerto Rico
🇸🇬 Singapore
🇱🇰 Sri Lanka
🇺🇸 United States of America (USA)
🇺🇾 Uruguay
🇻🇮 U.S. Virgin Islands
🇻🇳 Vietnam
🇦🇱 Albania
🇦🇩 Andorra
🇦🇬 Anguilla
🇦🇬 Antigua and Barbuda
🇦🇷 Argentina
🇦🇲 Armenia
🇦🇼 Aruba (Netherlands Antilles)
🇦🇿 Azerbaijan
🇧🇸 Bahamas
🇧🇭 Bahrain
🇧🇩 Bangladesh
🇧🇧 Barbados
🇧🇲 Bermuda
🇧🇴 Bonaire (Netherlands Antilles)
🇧🇦 Bosnia and Herzegovina
🇻🇬 British Virgin Islands
🇧🇳 Brunei
🇧🇫 Burkina Faso
🇰🇭 Cambodia
🇨🇲 Cameroon
🇨🇦 Canada
🇰🇾 Cayman Islands
🇨🇳 China
🇨🇼 Curaçao (Netherlands Antilles)
🇹🇷 Cyprus, North (Turkey)
🇨🇮 Côte d’Ivoire (Ivory Coast)
🇩🇲 Dominica
🇩🇴 Dominican Republic
🇪🇨 Ecuador
🇪🇬 Egypt
🇫🇴 Faroe Islands
🇬🇦 Gabon
🇬🇪 Georgia
🇬🇭 Ghana
🇬🇱 Greenland
🇬🇩 Grenada
🇬🇳 Guinea
🇬🇾 Guyana
🇭🇹 Haiti
🇭🇳 Honduras
🇮🇳 India
🇯🇲 Jamaica
🇯🇵 Japan
🇯🇴 Jordan
🇰🇿 Kazakhstan
🇰🇪 Kenya
🇽🇰 Kosovo
🇰🇼 Kuwait
🇰🇬 Kyrgyzstan
🇱🇷 Liberia
🇲🇬 Madagascar
🇲🇼 Malawi
🇲🇾 Malaysia
🇲🇽 Mexico
🇲🇩 Moldova
🇲🇪 Montenegro
🇲🇸 Montserrat
🇲🇦 Morocco
🇲🇲 Myanmar
🇳🇪 Niger
🇳🇬 Nigeria
🇲🇰 North Macedonia
🇴🇲 Oman
🇵🇰 Pakistan
🇵🇾 Paraguay
🇶🇦 Qatar
🇷🇼 Rwanda
🇧🇶 Saba (Netherlands Antilles)
🇰🇳 Saint Kitts and Nevis
🇱🇨 Saint Lucia
🇻🇨 Saint Vincent and the Grenadines
🇸🇦 Saudi Arabia
🇸🇳 Senegal
🇷🇸 Serbia
🇸🇨 Seychelles
🇧🇶 Sint Eustatius (Netherlands Antilles)
🇧🇶 Sint Maarten (Netherlands Antilles)
🇿🇦 South Africa
🇰🇷 South Korea
🇸🇷 Suriname
🇹🇼 Taiwan
🇹🇯 Tajikistan
🇹🇭 Thailand
🇹🇹 Trinidad and Tobago
🇹🇳 Tunisia
🇹🇷 Turkey
🇹🇨 Turks and Caicos Islands
🇺🇬 Uganda
🇺🇦 Ukraine
🇦🇪 United Arab Emirates (UAE)
🇺🇿 Uzbekistan
🇿🇲 Zambia
73 Roaming Destinations
12GB
🇦🇽 Åland
🇦🇺 Australia
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇷 Brazil
🇧🇬 Bulgaria
🇪🇸 Canary Islands
🇨🇱 Chile
🇨🇴 Colombia
🇨🇷 Costa Rica
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇸🇻 El Salvador
🇪🇪 Estonia
🇫🇰 Falkland Islands
🇫🇮 Finland
🇫🇷 France
🇩🇪 Germany
🇬🇮 Gibraltar
🇬🇷 Greece
🇬🇱 Greenland
🇬🇵 Guadeloupe
🇬🇹 Guatemala
🇬🇬 Guernsey
🇬🇫 Guyane (French Guiana)
🇭🇰 Hong Kong
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇩 Indonesia
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇲🇴 Macao
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇿 New Zealand
🇳🇮 Nicaragua
🇳🇴 Norway
🇵🇦 Panama
🇵🇪 Peru
🇵🇱 Poland
🇵🇹 Portugal
🇵🇷 Puerto Rico
🇷🇪 Réunion
🇷🇴 Romania
🇧🇱 Saint-Barthélemy
🇫🇷 Saint-Martin (FR)
🇸🇲 San Marino
🇸🇬 Singapore
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇱🇰 Sri Lanka
🇸🇪 Sweden
🇨🇭 Switzerland
🇻🇮 U.S. Virgin Islands
🇺🇾 Uruguay
🇺🇸 USA
🇻🇦 Vatican City
🇻🇳 Vietnam
Why Unlimited Data SIMs Are Perfect for You
- No worrying about exceeding data limits.
- Ideal for heavy streaming, gaming, and remote work.
- Stay connected anywhere in the UK and abroad.
- Perfect for multiple devices if you share your SIM or hotspot.
FAQs About Three Unlimited Data SIMs
Q: Can I use my phone abroad?
A: Yes, Three’s Go Roam feature works in 71 destinations.
Q: Do I need a new phone?
A: No, unlimited SIMs work with your existing unlocked device.
Q: Can I upgrade my plan?
A: Yes, you can switch plans or add extras anytime.
Ready to Get Your Unlimited Data SIM?
✅ Visit Three SIM Only Deals
💬 Questions? Check out our guides and reviews for more info.
