Smarty 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.
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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.
Contract Length
Roaming Destinations
Additional
47 Roaming Destinations
5GB
🇦🇹 Austria
🇵🇹 Azores
🇧🇪 Belgium
🇧🇬 Bulgaria
🇪🇸 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus (Excludes Northern Cyprus)
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇮 Gibraltar
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇽🇰 Kosovo
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇲🇨 Monaco
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇲 San Marino
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇵🇲 St Pierre & Miquelon
🇸🇪 Sweden
🇨🇭 Switzerland
🇺🇦 Ukraine
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
46 Roaming Destinations
5GB
🇦🇽 Aland Islands
🇦🇹 Austria
🇵🇹 Azores
🇪🇸 Balearic Islands
🇧🇪 Belgium
🇧🇬 Bulgaria
🇮🇨 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇬🇫 French Guiana
🇩🇪 Germany
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇾🇹 Mayotte
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Reunion
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇧🇱 St. Barthelemy
🇸🇪 Sweden
🇻🇦 Vatican City
Smarty Unlimited Data SIM Only Plans: Flexible and Affordable Mobile Freedom
Looking for a SIM-only plan with unlimited data? Smarty offers flexible, no-contract plans on Three’s network, ideal for streaming, gaming, social media, and everyday browsing. With unlimited calls and texts included, Smarty unlimited SIM-only plans provide freedom and transparency for all types of users.
Why Choose Smarty Unlimited SIM Only?
- Unlimited Data: Stream, browse, and game without limits.
- Unlimited Calls & Texts: Stay connected with unlimited UK minutes and messages.
- No Contract: Cancel anytime without penalties, perfect for flexibility.
- eSIM Compatible: Activate your plan digitally without a physical SIM.
- Data Rollover: Unused data rolls over automatically to the next month.
- Wi-Fi Calling & VoLTE: Improved call quality even in low-signal areas.
- Three Network Coverage: Strong UK-wide 4G and growing 5G network.
Key Features of Smarty Unlimited Plans
Smarty unlimited SIM-only plans offer:
- Full UK coverage on Three’s reliable 4G and 5G networks.
- Unlimited calls and texts, ideal for heavy users.
- Flexible, transparent billing with no hidden fees.
- Data rollover to maximize your plan’s value.
- Support for tethering and mobile hotspot to share data with other devices.
- Wi-Fi calling and VoLTE for better connectivity in low-signal areas.
- Access to Smarty’s app for easy plan management and data tracking.
Frequently Asked Questions About Smarty Unlimited SIM Plans
Q: Can I keep my number when switching to Smarty?
A: Yes, simply request a PAC code from your current provider and provide it to Smarty for a seamless transfer.
Q: Are Smarty unlimited plans truly no-contract?
A: Yes, all unlimited plans are monthly rolling with no long-term commitment.
Q: Can I share my Smarty data with other devices?
A: Yes, tethering and mobile hotspot features are included.
Q: Are Smarty plans 5G ready?
A: Yes, Smarty SIMs support 5G where Three’s coverage is available.
Q: Can I use my Smarty SIM abroad?
A: Smarty offers roaming in select countries. Check the website for current coverage details.
Q: How do I manage my Smarty plan?
A: Use the Smarty app to track usage, manage data rollover, and adjust your plan easily.
How to Choose the Right Smarty Unlimited Plan
- Determine your typical monthly data usage to ensure unlimited is right for you.
- Choose the flexibility of rolling monthly plans with no contract commitment.
- Check for additional perks like tethering, Wi-Fi calling, and data rollover.
- Compare with other unlimited providers to find the best network and coverage for your needs.
Compare Other Unlimited SIM-Only Deals
If Smarty Unlimited isn’t right for you, explore other UK unlimited SIM-only providers:
