Three SIM only deals

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texts
200
minutes
2GB
of 5G data
12
month contract
£5.00
per month
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
1GB
of 5G data
12
month contract
£5.00
per month
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
4GB
of 5G data
12
month contract
£6.00
per month
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
1GB
of 5G data
12
month contract
£6.00
per month
  • Free delivery
  • 14 day returns policy
Exclusive
Unltd
texts
Unltd
minutes
12GB
of 5G data
12
month contract
£8.00
per month
  • Includes a £10 Amazon Gift Card
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
8GB
of 5G data
12
month contract
£8.00
per month
  • Free delivery
  • 14 day returns policy
Exclusive
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texts
Unltd
minutes
30GB
of 5G data
12
month contract
£10.00
per month
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
12GB
of 5G data
12
month contract
£10.00
per month
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
1GB
of 5G data
24
month contract
£6.00
per month
  • Free delivery
  • 14 day returns policy
Unltd
texts
+ £10 cashback at
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+ £10 cashback at
4GB
of 5G data
12
month contract
£13.00
per month
  • Free delivery
  • 14 day returns policy

Three SIM only deals

three logo

With generous data allowances at affordable prices, Three SIM only deals are an attractive option for Netflix bingers, Spotify streamers and avid gamers. While there are cheaper SIM-only deals out there from some smaller networks, Three is arguably the cheapest of the four main providers – the others being O2, Vodafone and EE.

Compare deals

Our best Three SIMs this week

  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile

Why choose a Three SIM?

  • Good coverage: Three offers extensive 3G and 4G coverage, as well as a growing 5G network
  • Above-average speeds: Three’s speeds are good, but they are beaten by the likes of EE and Vodafone
  • Tethering: You can tether your phone on all Three SIM only plans
  • Excellent roaming schemes: Even on the cheaper Essential plans, you can use your UK allowances in up to 49 destinations
  • Wi-Fi calling: On offer to all customers and allows them to call and text in the UK in locations with no mobile signal

Is Three a good network?

Three launched back in 2003 and is one of the four main networks. This means it operates its own infrastructure and does not depend on any other network for coverage quality.

Three isn't quite as cheap as it once was. But there's a lot to recommend it.

All of Three's plans come with unlimited calls and texts and are 5G ready, so you'll be able to experience fast mobile internet speeds for no extra cost

Roaming on Three is impressive. Essential plans let you use your UK allowances for no extra cost in 49 European locations with Three’s Go Roam in Europe scheme.

With the more costly Advanced plans, you can use your allowances in 71 locations worldwide.

And for £5 per day you can sign up for Three's Data Passport for unlimited data usage in 89 destinations worldwide with Go Roam around the world.

What to look for in a Three SIM contract

There are lots of options when it comes to SIM deals from Three. The most important things to look at are monthly allowances and price. It's critical to ensure you’re not paying for more data than you actually need.

We can help you find the best Three SIM deal with our comparison table.

Simply adjust the filters so you only see the most relevant deals for your requirements, sort them in the way you like and select the deal you like the look of. Click through to Three to sign up.

Cheap Three SIMs

  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile

Does Three offer SIM plans for bad credit?

You will have to pass a credit check to take a SIM plan out with Three. If you fail, you won’t be able to take out a Pay Monthly plan, but you can still join on Pay As You Go.

12-month Three SIMs

There are many options for 12-month SIM deals on Three, and these are usually cheaper than 30-day ones. You can choose between Three’s Essential or Advanced plans.

Three SIMs with unlimited data

Three’s all-you-can-eat data tariffs mean you can watch, read, listen and play as much as you want online on your mobile, and not worry about being charged extra.

Unlimited data plans tend to be more expensive though, so make sure you actually use the amount of data you think you do, or you might end up paying for a contract you don’t really need.

Check out our guide on how much mobile data you really need.

Should I get unlimited calls and texts?

All Three SIM-only deals come with unlimited calls and texts.

Which networks offer good SIM plan alternatives?

Frequently asked questions

Can I use my Three SIM abroad?

Yes, you can. On Three Essential plans you can roam for no extra charge in 49 European locations with Three's Go Roam in Europe scheme.

If you're signed up to an Advanced plan, this extends to 71 locations around the world. These include Australia, Brazil, Israel, New Zealand, Sri Lanka and the USA.

Can I get 5G enabled Three SIMs?

Yes, all Three’s SIMs are now 5G ready. So as long as you have a 5G phone, you’re good to go.

Can I keep my mobile number if I switch to a Three SIM-only deal?

Yes, it's almost always possible to keep your current phone number when you switch to a new network.

If you’re moving from another network, you’ll need to call them and request your PAC (porting authorisation code). You can also do this online or via text. You will need to provide this to Three who will move your number over.

If you are already a Three customer, they will port your number over for you.

Do I need an unlocked phone to use a Three SIM?

Your phone does need to be unlocked to use a Three SIM card. The good news is that it’s easy to check whether your phone is locked by popping a friend or family’s SIM card (from a different provider to yours) into your phone.

If it works, then it’s unlocked. Otherwise you'll need to contact your current operator and ask them to unlock it for you.

Are Three SIM-only deals cheaper than contract?

Yes, SIM-only deals tend to be cheaper in the long run compared to phone-and-SIM contracts because you’re not paying back the cost of a handset.

Three do have some great contract deals though and the overall difference in cost for slightly older or less fancy phones is not much.

If you'd rather not splash out on a handset upfront, a Three contract can give you all the same benefits as its SIM plans and make your costs more reasonable.