Updated automatically with the latest Three SIM plans
If you’re looking for a Three Mobile SIM only deal, you’re in the right place. Whether you want a cheap monthly plan, a big-data bundle, or a flexible, no-contract SIM, Olimit.co.uk keeps this page updated automatically with the freshest offers available right now.
Below you’ll find the latest live Three SIM-only deals — including unlimited data, eSIM options, and no-credit-check plans.
Why Pick Three Mobile?
Three is one of the UK’s most popular networks, offering fast 5G coverage, great value for money, and no-nonsense SIM options.
Most Three SIM-only plans come with:
-5G access at no extra cost
-Unlimited minutes and texts
-Free tethering and hotspot use
-eSIM support for instant activation
–Roaming in up to 45 destinations
If you’re switching from another provider, you can usually move your number in minutes. Use our PAC Code Guide for step-by-step help.
Latest Three SIM-Only Deals
Below are the current Three Mobile offers, refreshed daily through Olimit’s live listing system.
You’ll always see the newest discounts, short-term promos, and data bundles — no expired plans, no guesswork.
👉 Compare the latest deals right here:
Three Lite SIM Only
eSIMAvailable
60GBof data£9until April 2026Price rises every April in contract by £1.9012 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailable250GBof data£16until April 2026Price rises every April in contract by £2.3012 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailable60GBof data£10until April 2027Price rises every April in contract by £1.9024 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailable120GBof data£12until April 2027Price rises every April in contract by £2.3024 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailable25GBof data£14until April 2027Price rises every April in contract by £1.9024 Months ContractThree+ rewards includedThree Pay as you Go – Data Packs SIM Only
eSIMAvailableThree+ rewards includedThree Pay as you Go – Data Packs SIM Only
eSIMAvailableThree+ rewards includedThree Lite SIM Only
eSIMAvailableUnlimiteddata£22until April 2027Price rises every April in contract by £2.3024 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailable80GBof data£10until April 2026Price rises every April in contract by £1.9012 Months ContractThree+ rewards includedThree Pay as you Go – Data Packs SIM Only
eSIMAvailableThree+ rewards includedThree Lite SIM Only
eSIMAvailable120GBof data£12until April 2026Price rises every April in contract by £2.3012 Months ContractThree+ rewards includedThree Pay as you Go – Data Packs SIM Only
eSIMAvailableThree+ rewards includedThree Lite SIM Only
eSIMAvailable15GBof data£7until April 2026Price rises every April in contract by £1.9012 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailable250GBof data£16until April 2027Price rises every April in contract by £2.3024 Months ContractThree+ rewards includedThree Lite SIM Only
eSIMAvailableUnlimiteddata£18until April 2026Price rises every April in contract by £2.3012 Months ContractThree+ rewards included
What You Get With a Three SIM Plan
- 5G speeds across major UK cities — check our 4G & 5G Speed Guide for network performance.
- No long contracts – choose rolling monthly or 12-month options.
- Instant activation with eSIM support on most new phones.
- Flexible data plans for light users or heavy streamers.
- Roaming available in over 45 countries.
If you’re not sure which SIM type fits your phone, read our SIM Card Type Guide — it explains eSIM vs nano SIM vs PAYG in simple terms.
Explore More on Olimit
- 🔍 All SIM-Only Deals – every UK network, updated live.
- 📶 Unlimited Data SIMs – for power users and remote workers.
- 📖 Guides & Tutorials – how-tos, tips, and switching advice.
- ⭐ Customer Reviews – see what real users think.
- 📞 Contact Us – quick support from our team.
Why Use Olimit.co.uk
At Olimit, we compare all major UK networks — including Three, EE, Vodafone, O2, and Smarty — to help you find the best deal without hidden fees or outdated info.
We combine verified partner feeds and human-checked listings to make sure every price you see is current.
That means when a provider launches a new deal, it appears here automatically — no waiting for monthly updates.
Common Questions
Does Three offer eSIM?
Yes — eSIM is available on most new devices, and activation takes just a few minutes.
Can I keep my number when switching?
Absolutely. Get your PAC code and follow our PAC Code Guide to transfer your number easily.
Is 5G included on all plans?
Yes — Three includes 5G coverage at no extra charge.
Where can I see all networks?
Check our SIM-Only Deals page to compare offers from every UK provider.