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Three SIM only deals for January: how they compare on price

Three logo with a SIM card

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We've taken each of Three's best SIM only plans this month and compared them on price with other UK networks. Here's what we found. SIM Sherpa is your trusty guide. Last updated: 4th January 2021.

Three's best SIM only deals

Our favourite current Three SIM only deal

Three SIM card
 
Unlimited data
£18
a month

12-month dealGet this deal

at three.co.uk
(opens in new window)

Out of all the SIM only plans available this January on Three, we'd say their best value deal is their 12‑month SIM below, which gets you unlimited data, plus unlimited minutes and texts for £18 a month:

It's definitely one of Three's best. But it's not market-leading. You can get a similar plan on other providers for less, even if you need your SIM to use the Three network. See who's offering it for less here:

Their 12GB for £8 SIM is another good option

Three SIM card
 
12GB data
£8
a month

12-month dealGet this deal

at three.co.uk
(opens in new window)

If you don't need that much data, our next best pick of Three SIM only plans is their 12‑month £8 deal below, which gets you 12GB data and unlimited minutes and texts:

Even though it's in our pick of Three's best SIM only deals, you can actually beat it on price with other providers, including ones that also use the Three network. Here's where you can beat it on other networks:

Three's 4GB for £6 plan is a good option too

Three SIM card
 
4GB data
£6
a month

12-month dealGet this deal

at three.co.uk
(opens in new window)

For less monthly data, Three are also offering this £6 SIM, which includes 4GB data, unlimited minutes and texts on a 12‑month plan. It's another of their best deals:

It's currently the best priced 4GB data or more SIM only deal on a provider using the Three network, even if you can beat it on price if you're open to ones not on Three. See lower-priced networks' deals here:

Other Three guides