Three has a number of hidden SIM-only deals, including 30GB data for £8 and unlimited data for £16. Save money with their exclusive deals.

In the UK, Three has a number of hidden SIM-only deals that you won’t be able to find if you go directly to their website. When you get one of the hidden SIM-only deals, you’ll normally benefit from a reduced monthly price or an increased data allowance on your SIM-only plan.

At present, the hidden SIM-only plans include 2GB data for £5/month and 30GB data for £8/month. There’s also unlimited data available for just £16/month.

In this article, we’ll look at Three’s SIM-only deals and where you’re able to buy their hidden SIM-only plans. We’ll also look at some of the inclusive features you’ll get on your ‘Advanced plan’ from Three including 5G coverage, personal hotspot, Go Roam Around The World and the Three+ app.

Prices From: £5 per month
Contract Length: 1 month, 12 month or 24 month contract
Hidden SIM Only Deals:
Inclusive Features:
  • Includes access to 5G at no extra cost without any speed limits.
  • Personal hotspot is included on all Advanced SIM-only plans.
  • Get exclusive offers and rewards using the Three+ app.
Coverage:

Best Three SIM Only Deals

In the UK, Three has a number of hidden SIM-only deals on their website. You won’t be able to find them if you look at the listings on their website but they’re available when you order through the special links below.

The hidden SIM-only deals will allow you to save a couple of pounds each month against the normal price on Three’s website. You can also benefit from a shorter 12-month contract (whereas many of the best value deals advertised by Three require a 24-month contract).

NetworkMinutesTextsDataMonthly
Cost
Three200Unlimited2GB£5.00
12 months
ThreeUnlimitedUnlimited4GB£6.00
12 months
ThreeUnlimitedUnlimited8GB£7.00
12 months
ThreeUnlimitedUnlimited20GB£8.00
12 months
ThreeUnlimitedUnlimited30GB£9.00
12 months
ThreeUnlimitedUnlimited100GB£12.00
12 months
ThreeUnlimitedUnlimitedUnlimited£17.00
12 months
  • For £5/month, you can get Three’s cheapest SIM-only deal. This gives you 200 minutes, unlimited texts and 2GB of data per month.
  • For £8/month, you can get a SIM card with 30GB of data per month. This is one of Three’s most popular price plans as it offers a large amount of data at a very competitive price.
  • For £16/month, you can get a SIM card with unlimited data on Three. There are no hidden limits or speed restrictions on this, making it one of the UK’s best value unlimited data plans.

All of the SIM cards will give you 99.8% population coverage on Three with access to their 5G network at no extra cost. You’ll transact through the official Three website and you’ll get all of the normal customer benefits including personal hotspot, Go Roam and the Three+ app.

SIM Only Deals: By Data Allowance

2GB Data

Three has an entry-level SIM card costing £5 per month on a 12-month contract. It includes 200 minutes, unlimited texts and 2GB of data when you order through the link below:

NetworkMinutesTextsDataMonthly
Cost
Three200Unlimited2GB£5.00
12 months

A 2GB data plan should be suitable if you’re a light mobile user or if you mainly use a wi-fi connection at home and at work. It should allow you to browse the internet for around an hour each day. Alternatively, you can watch around 4 hours of standard-definition video each month using your 2GB data allowance.

4GB Data

For £6 per month, you can upgrade to Three’s SIM-only deal with unlimited minutes, unlimited texts and 4GB of data.

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimited4GB£6.00
12 months
ThreeUnlimitedUnlimited4GB£6.00
24 months
ThreeUnlimitedUnlimited4GB£19.00
1 month

In 2019, the average mobile user consumed around 3GB of data per month (up from 1.9GB per month in 2017). Therefore, a 4GB data plan should probably cover your data consumption if you’re a light-to-medium data user (but without very much leeway in the months where you might want to use a little more data).

8GB Data

If you’re looking for an 8GB data plan, Three currently offers a hidden SIM-only deal costing just £7 per month. This also includes unlimited UK minutes and unlimited UK texts. If you're looking for a special offer, you can choose their 24-month plan where you pay £5 for the first 6 months, followed by £10 per month for the remaining length of your contract.

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimited8GB£7.00
12 months
ThreeUnlimitedUnlimited8GB£7.00
24 months

An 8GB data plan should allow you to browse the web for around 3 hours per day or to watch around 30 minutes of standard-definition video each day. However, things like HD-quality video streaming can use up your data very quickly (e.g. just 4 hours of HD video will use up 8GB of data). For this reason, if you often stream or share HD-quality videos on your phone, you might want to choose an even larger data plan.

12GB Data

One of Three’s most popular SIM-only plans is their hidden 12GB data deal which costs £8 per month. It gives you a decent data allowance at a very competitive price point, along with a saving against the normal price on Three’s website.

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimited20GB£8.00
12 months
ThreeUnlimitedUnlimited12GB£8.00
24 months
ThreeUnlimitedUnlimited12GB£22.00
1 month

A 12GB data plan will allow you to browse the internet for around 144 hours, to stream 2,400 songs or to watch 24 hours of standard-definition video online.

30GB Data

If you’re looking for a larger data allowance, Three offers a hidden 30GB data plan for £8 per month. You can choose between the following plans depending the length of contract you’d like to sign up for:

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimited30GB£8.00
24 months
ThreeUnlimitedUnlimited30GB£9.00
12 months
ThreeUnlimitedUnlimited30GB£24.00
1 month

Three’s 30GB data plan will allow you to browse the internet for around 360 hours per month, to stream 6,000 songs or to watch 60 hours of standard-definition video online.

100GB Data

At present, Three offers 100GB of data for £12/month. This is a slightly cheaper alternative to their unlimited data SIM card which costs £16/month.

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimited100GB£12.00
12 months
ThreeUnlimitedUnlimited100GB£12.00
24 months

If you’re considering the 100GB data plan on Three, we’d normally recommend choosing their unlimited data plan instead. For just a little bit more each month, you’ll get truly unlimited downloads on your SIM card with no need to worry about how much data you’re using each month.

Unlimited Data

At present, Three offers an unlimited data SIM card for just £16/month. This is a hidden deal which is only available when you purchase through this link (it isn’t available if you go directly to the listing on Three’s website).

As an alternative, you can choose a 24-month unlimited data SIM card where you'll pay £12 for the first 6 months, followed by £24 per month for the remaining length of your plan.

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimitedUnlimited£16.00
24 months
ThreeUnlimitedUnlimitedUnlimited£17.00
12 months
ThreeUnlimitedUnlimitedUnlimited£24.00
1 month

If you choose a Three unlimited data plan, you’ll get unlimited data without speed limits or hidden fair usage limits. You’ll also get access to Three’s 5G network at no extra cost, along with the tethering and personal hotspot feature. This allows you to share your unlimited data allowance with other devices.

Three SIM Only Features

5G Network

You’ll get access to Three’s 5G network at no extra cost on all of their SIM-only plans (this includes on their hidden SIM-only deals).

According to Ookla (H1 2021 data), Three has the UK’s fastest 5G network with a median download speed of 222Mbps and a median upload speed of 14Mbps.

As well as giving you faster download speeds in more than 300 UK towns and cities, you’ll also benefit from more network capacity and a lower amount of latency when you’re connected to 5G.

You can enter your postcode on Three’s online coverage map to see whether 5G is available where you live. Alternatively, there’s a full list of locations in our Three 5G coverage map.

Go Roam

On Three, you can use your mobile phone abroad for a fixed daily charge in 71 worldwide destinations. The charge is £2 per day when you’re travelling in Europe and £5 per day when you’re travelling in a Go Roam country outside Europe.

The fixed daily charge for using Go Roam has been in place since the 23rd May 2022.

Personal Hotspot

Tethering or personal hotspot refers to the process of sharing your smartphone’s internet connection with another device (e.g. with your laptop or tablet). It’s a convenient way to share your data allowance with another device, especially when you’re out and about.

On Three’s latest “Advanced” SIM-only plans, you can use tethering and personal hotspot without restrictions in the UK. This includes if you’re using Three’s unlimited data plan. Any data consumed through the tethering feature will simply be deducted from your data allowance as normal.

99% Coverage

In the UK, Three offers 99.8% population coverage. This includes 98.3% population coverage on their 3G network and 99.8% population coverage on their 4G network. There’s also 5G coverage in more than 300 UK towns & cities.

Regardless of which SIM-only deal you choose, you’ll have access to the same network and coverage from Three. You can check the coverage in your area before you sign up:

Check Three Coverage (three.co.uk) →

For more information, see our guide to Three’s mobile network coverage.

Three+ App

On all of Three’s SIM-only deals, you’ll now be able to access the Three+ rewards application. This gives you access to exclusive offers and discounts such as the following:

  • Get 20% off your Uber Eat orders.
  • Get a £3 ticket at Cineworld every weekend.
  • Get 2 mains for £10 when dining at Frankie & Benny’s.

For more information, see our Three+ mobile app review.

More Information

For more information about Three’s SIM-only deals, please see the official Three UK website. You can also read our in-depth guides on Three’s UK network, unlimited data plans on Three, Go Roam and the Three+ app.

To order a hidden SIM-only deal, tap on the relevant plan in the comparison tables above. You’ll then be taken to Three’s website where you can place an order for your SIM card.

Your Comments 5 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 5 comments from readers. You can add your own comment here.

  • The table near the top, above the contents is missing the 4GB data for £6 and 100GB for £15. Perhaps these were omitted intentionally.

    What about upgrading if one finds the allowance isn’t enough? When on one of the hidden plans, is it possible to upgrade to the next hidden one up?

    For example, suppose one subscribes to the 2GB of data £5 and finds it isn’t enough; is it possible to move to the 4GB for £6?

    I may ask a similar question of other operators. Perhaps this is a subject to discuss on a page of its own, analysing the policies of each provider.

    • Hi Dave,
      Thanks for bringing this to my attention – this has now been fixed! 🙂
      With regards to upgrades, I don’t believe these will be available when you upgrade. If you want to increase your data allowance, you can do this through the My3 app but I believe they’ll only show you their normal plans there.
      Ken

  • Ken
    Are there any 3 offers available on PAYG bundles please ? I have already got a 3 PAYG SIM with some credit thereon.
    Thanks.
    Paul

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