Three’s Hidden SIM Only Deals: 15GB for £7, 60GB for £9 & 80GB for £10

Three has a number of hidden SIM-only deals, including 15GB for £7, 60GB data for £9, and 80GB data for £10. Save money with their exclusive SIMO deals.

In the UK, Three offers a number of hidden SIM-only deals that you won’t be able to find if you go directly to their website. You can save a substantial amount of money with these hidden deals. For instance, you can get 15GB data for £7. There’s also 60GB data for £9, 120GB data for £12, and 250GB data for £16.

Alongside their ‘Lite SIMO’ plans, Three also offers ‘Value SIMO’ and ‘Complete SIMO’ plans. If you upgrade to one of these Value or Complete SIMO plans, you’ll get inclusive roaming, along with a subscription to Paramount+ service.

In this article, we’ll look at Three’s best SIM-only deals, including all of the hidden plans that can save you money. We’ll also compare the Lite, Value and Complete SIM-only plans from Three, including the benefits of each one. We’ll also look at how you can transfer your existing phone number to Three.

Prices From:	£7 per month
Contract Length:	12 month or 24 month contract
Hidden SIM Only Deals:	15GB data for £7 60GB data for £9 80GB data for £10 120GB data for £12 250GB data for £16 Unlimited data for £18
Inclusive Features:	Three+ app with weekly discounts (e.g. Cineworld & Caffè Nero). Inclusive roaming & Paramount+ on Value & Complete SIMO plans. Get 5G at no extra cost, with the fastest available speeds.
Coverage:	5G coverage in 600+ UK towns & cities (check your postcode) 99.8% population coverage on 4G

Best Three SIM Only Deals

In the UK, Three offers a number of hidden SIM-only deals. You’ll need to follow special links to their website to find these hidden deals, which can save you up to £7 per month against the normal price.

• If you’re a light mobile user, Three offers 15GB data for £7. On this plan, you’ll get more data and for a lower monthly price than if you were to go directly to Three’s website.
• For most users, our recommended plans are 60GB data for £9 or 80GB data for £10. This is enough data for the average UK mobile user.
• For heavy data users, there’s 250GB data for £16 and unlimited data for £18. This is reduced from the standard price on Three’s website, which is 120GB data for £16 and unlimited data for £25.

The following table shows the best 12-month SIM-only deals from Three:

Plan	Data	Monthly Cost
Lite Unlimited mins Unlimited texts	15GB data	£7.00 per month 12 month contract Monthly cost rising to £8.90 on 1 Apr 2027	See deal
Lite Unlimited mins Unlimited texts	60GB data	£9.00 per month 12 month contract Monthly cost rising to £10.90 on 1 Apr 2027	See deal
Lite Unlimited mins Unlimited texts	80GB data	£10.00 per month 12 month contract Monthly cost rising to £11.90 on 1 Apr 2027	See deal
Lite Unlimited mins Unlimited texts	120GB data	£12.00 per month 12 month contract Monthly cost rising to £14.30 on 1 Apr 2027	See deal
Lite Unlimited mins Unlimited texts	250GB data	£16.00 per month 12 month contract Monthly cost rising to £18.30 on 1 Apr 2027	See deal
Lite Unlimited mins Unlimited texts	Unlimited data	£18.00 per month 12 month contract Monthly cost rising to £20.30 on 1 Apr 2027	See deal

All of these deals are Lite SIMO plans (previously known as ‘Standard SIMO’ plans). They’ll give you access to Three’s 5G network with no speed limits or restrictions. You’ll also get access to the Three+ app included as standard.

For additional benefits like inclusive roaming and Paramount+, you can choose a ‘Value SIMO’ or ‘Complete SIMO’ plan instead (see below).

Value & Complete SIMO Plans

If you’re looking for additional plan benefits, you can upgrade your ‘Lite SIMO’ plan to a Value SIMO plan or a Complete SIMO plan from Three:

• On Three’s Value SIMO plans, you’ll be able to use your mobile phone at no extra cost in 49 European destinations. You’ll also get Paramount+ included for the first half of your plan (worth £4.99 per month).
• Meanwhile, Three’s Complete SIMO plans will give you their most comprehensive international roaming offer. It comes with inclusive roaming in a massive 160 worldwide destinations. You’ll also get Paramount+ included for the entire length of your plan.

Keeping Your Phone Number

If you’re switching to Three, it’s a straightforward process keeping your current phone number.

Start by asking your current mobile network to give you a PAC Code. You can get one by texting PAC to 65075, or you can request one online through your mobile network’s website or app.

Once you’ve gotten your PAC Code, you’ll be able to place your order online with Three. You can provide them with the PAC Code when you sign up, or wait until the SIM card arrives and then fill out this form on their website.

For step-by-step instructions on transferring your phone number to Three, please select your current mobile network from the drop-down menu below:

For more information, see our full guide to transferring your phone number between networks.

More Information

To get one of Three’s hidden SIM-only deals, tap on the relevant plan in the comparison tables above. You’ll then be taken to the Three website where you can place your order online.