Three Mobile Unlimited data SIM only deals
At Olimit, we help you compare the best unlimited SIM Only deals — all in one place.
Keep your phone, ditch the restrictions.
Read More
If you want no limits on how much data you use, an unlimited data SIM Only deal is the smart choice.
Most UK networks now offer unlimited plans to suit different budgets, so you can stream, scroll, and stay connected without worrying about caps.
Olimit Tips & Tricks
Do I need unlimited data SIM Only deal?
Unlimited data SIMs offer complete freedom, but they often come at a higher monthly cost. Before you commit, think about your usage. The average UK mobile user only uses around 10GB of data per month, so if you mainly browse, message, and stream occasionally, a smaller data plan might save you money.
However, if you’re always streaming Netflix, gaming on the go, using your phone as a hotspot, or working remotely, an unlimited data plan could be the hassle-free option you need. At Olimit, we help you compare unlimited and capped SIM Only deals, so you can find the best match for your data habits and budget.
Can I use my unlimited data SIM abroad?
It depends on the network. Look for 
in the deal listings below — it will show you how much roaming data is included and which countries are covered.
Before you travel, always check your network’s roaming fair usage policy and whether your destination is included. At Olimit, we make it easy to compare unlimited SIM Only deals with roaming included, so you can stay connected abroad without unexpected charges.
Provider
Network
Data
Price
Contract Length
Roaming
Additional
Lebara SIM Only
for 3 Months,
37 Roaming Destinations
5GB
Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Gibraltar 🇬🇮
Greece 🇬🇷
Guadeloupe 🇬🇵
Guyane (French Guiana) 🇬🇫
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Martinique 🇲🇶
Mayotte 🇾🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Réunion 🇷🇪
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪
Lebara SIM Only
for 3 Months,
37 Roaming Destinations
5GB
Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Gibraltar 🇬🇮
Greece 🇬🇷
Guadeloupe 🇬🇵
Guyane (French Guiana) 🇬🇫
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Martinique 🇲🇶
Mayotte 🇾🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Réunion 🇷🇪
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪
Mozillion SIM Only
41 Roaming Destinations
0.5GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
Mozillion SIM Only
41 Roaming Destinations
0.5GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
Mozillion SIM Only
41 Roaming Destinations
0.75GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
Lebara SIM Only
for 3 Months,
37 Roaming Destinations
30GB
Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Gibraltar 🇬🇮
Greece 🇬🇷
Guadeloupe 🇬🇵
Guyane (French Guiana) 🇬🇫
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Martinique 🇲🇶
Mayotte 🇾🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Réunion 🇷🇪
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪
Lebara SIM Only
for 3 Months,
37 Roaming Destinations
30GB
Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Gibraltar 🇬🇮
Greece 🇬🇷
Guadeloupe 🇬🇵
Guyane (French Guiana) 🇬🇫
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Martinique 🇲🇶
Mayotte 🇾🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Réunion 🇷🇪
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪
Lyca Mobile Sim
30 Roaming Destinations
5GB
🇦🇹 Austria
🇧🇪 Belgium
🇧🇬 Bulgaria
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇩🇪 Germany
🇬🇷 Greece
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇹 Italy
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇲🇹 Malta
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇸🇪 Sweden
Three Unlimited Data SIM Only Plans: Stream, Game & Browse Without Limits
Looking for unlimited data SIM only plans in the UK? Three offers flexible and affordable unlimited plans on its fast 5G-ready network, perfect for streaming Netflix, Spotify, gaming, or working on the go. Keep your number, enjoy unlimited calls and texts, and browse freely without worrying about data caps.
Why Choose Three Unlimited SIM Only?
- Unlimited Data: Stream, game, and browse without limits.
- Unlimited Calls & Texts: Stay connected without restrictions.
- Fast 5G Network: Access high-speed 5G coverage across the UK.
- Tethering & Hotspot: Share your unlimited data with other devices.
- Three+ Rewards: Exclusive perks, cashback offers, and discounts for Three customers.
- Flexible Plans: 30-day rolling contracts or 12-month options available.
- eSIM Compatible: Activate your SIM digitally without a physical card.
Compare Three Unlimited SIM Only Plans
Three offers a range of unlimited plans to suit different users. Choose between rolling 30-day contracts for flexibility or 12-month deals for better pricing. All plans include:
- Unlimited data, calls, and texts
- 5G access on compatible devices
- Tethering and hotspot support
- Three+ rewards perks
Whether you’re a heavy streamer, gamer, or remote worker, Three’s unlimited plans give you the freedom to use your phone without limits.
Frequently Asked Questions About Three Unlimited SIM Plans
Q: Can I keep my number when switching?
A: Yes. Request a PAC code from your current provider and give it to Three to transfer your number easily.
Q: Are there credit checks?
A: Pay Monthly unlimited plans require a credit check. Pay As You Go options are available if you want no credit approval.
Q: Can I use unlimited data for tethering?
A: Yes. Share your data with other devices without worrying about limits.
Q: Are Three unlimited plans 5G ready?
A: Yes, all current unlimited plans support 5G where coverage is available.
Q: Do these plans include international use?
A: Most unlimited plans exclude free roaming. Use Three’s Go Roam service for travel in Europe (£2/day) or elsewhere (£5/day).
Q: Can I cancel my unlimited plan anytime?
A: 30-day rolling contracts allow cancellation at any time. 12-month contracts may incur exit fees if cancelled early.
Top Benefits of Three Unlimited SIM Plans
- Unlimited streaming, gaming, and browsing without overage fees
- Access to Three+ rewards and exclusive offers
- Flexible eSIM and SIM options
- Strong coverage across 3G, 4G, and 5G networks
- Affordable monthly pricing compared to traditional phone contracts
🔁 Compare Other SIM-Only Deals
If Three Unlimited isn’t right for you, check out other SIM-only providers: