All our offers and discounts can be found when you shop our full range of SIM Only deals. Our offers are always updating, so keep checking back.
30-day SIMs: here’s why we love them
Flexibility
Our 30-day SIMs give you the ultimate flexibility, as you have the freedom to switch or change plans without being tied to a long-term commitment.
Adaptibility
If you need a short-term connectivity solution, then the 1 month SIM is the one for you. And easily adjust your plan in line with your calls, text, and data needs.
Trial period
This SIM offers you the perfect opportunity to test our network, and see if it’s right for you. Spend 30 days getting a feel for our network, coverage and speed before you make a longer-term choice.
Add some extras to your 1 month SIM
Get even more from Three, with these unmissable benefits:
Enjoy peak entertainment
Get hit movies, exclusive premieres and brilliant shows you can’t find anywhere else with Paramount+. Even on the go.
Roaming built-in
Going travelling? Use your phone like you’re at home for up to 56 days in over 160 worldwide destinations.
Why get a 30-day SIM on Three?
What’s a 30-day SIM Only plan?
From only £19, you can connect to our super-fast 5G network for 30 days. Perfect if you’re testing our network, or if you’re visiting the UK, or if you need a temporary solution.
How do 30-day SIMs work?
Our 30-day SIM Only plan gives you access to our network for – you’ve guessed it – 30 days. After that, if you’re happy with it, you can keep it as a 30-day rolling SIM Only contract.
You can keep your existing number
Moving your number across to Three is simple. You’ll need a PAC or STAC code from your current provider, and then it’s just a case of sending a text. Find out how to switch to Three.
Upgrade easily
If you love your 1 month SIM – and we think you will – then upgrading to a plan with a device, or moving to a longer-term SIM plan with Three is simple, and it can all be done online.
Easy activation
Once your SIM arrives, put it in your phone, and you’ll get a text confirming that you’ve connected Three automatically. You’ll be ready to go in no time.
Increase your data limit
If you run out of data, it’s easy to get more. You can increase your 30-day allowance or purchase a data Add-on anytime online, and start using your new data straight away.
Three+ rewards app
Download our Three+ app to claim exclusive offers from brands like Cineworld and Caffè Nero. Plus, presale tickets to some of the UK’s biggest festivals.
Unlimited data
30-day plan
What's included:
- 5G ready at no extra cost
- Unlimited calls and texts
- Three+ Rewards
25GB data
30-day plan
What's included:
- 5G ready at no extra cost
- Unlimited calls and texts
- Three+ Rewards
4GB data
30-day plan
What's included:
- 5G ready at no extra cost
- Unlimited calls and texts
- Three+ Rewards
Compare our SIM Only plans
Check out our SIM Only deals
From only £9, and with loads of different data options, there’s a SIM Only deal for everyone on Three. Check out our 12 month, 24 month and Pay As You Go SIMs.
Frequently asked questions
Why choose Three?
Based on analysis by Ookla® of Speedtest Intelligence® data for Q3-Q4 2024. Ookla trademarks used under license and reprinted with permission.