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

three logo with a SIM cardVisit three.co.uk

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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: 15th September 2021.

Three's best SIM only deals

Our highest-rated SIM only deal on Three this month

Three SIM card
 
12GB data
£8
a month

12-month dealGet this deal

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

We'd say the best SIM only plan Three are selling this September is their 12‑month 12GB deal below, which comes in at £8 a month and includes unlimited minutes and texts too:

It's a good enough deal to get into Three's best SIMs but you can actually get a lower price for a similar plan elsewhere, even if you definitely want it to use the Three network. See which networks that are cheaper here:

Three's £7 for 8GB is our next best choice now

Three SIM card
 
8GB data
£7
a month

12-month dealGet this deal

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

For people who don't need that much data, the next best SIM only plan on Three in our opinion is their 12‑month one below. For £7 a month, you get 8GB data, plus unlimited minutes and texts:

In comparison to the rest of Three's current SIM only plans, it's one of the best. But it is beatable on price, even if you're set on joining a provider that uses the Three network. Here's where else you can get a lower price:

Their £6 SIM with 4GB is our next favourite this September

Three SIM card
 
4GB data
£6
a month

12-month dealGet this deal

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

We also like their £15 for 100GB plan

Three SIM card
 
100GB data
£15
a month

12-month dealGet this deal

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

If you're even more data-hungry, our next best pick of Three SIM only plans is their 12‑month £15 deal below, which gets you 100GB data and unlimited minutes and texts:

Compared to Three's other deals, this comes out among the best. But it's worth knowing you can get a lower price elsewhere, even on other providers that use the Three network. Here's where you can beat it on other networks:

Their 30GB for £12 SIM is another good option

Three SIM card
 
30GB data
£12
a month

12-month dealGet this deal

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

Three's unlimited data for £16 plan is a good option too

Three SIM card
 
Unlimited data
£16
a month

12-month dealGet this deal

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

If you think you'll need even more data, you might like the £16 SIM only deal running on Three at the moment. It's a 12‑month plan, which comes with unlimited data, unlimited minutes and texts too:

This is good for Three but it's not an unbeatable price. You can get similar SIM only plans for less with some other providers, even ones that also use the Three network. Here are other networks you can beat it on:

Compare all SIM only plans

Compare deals from all networks

How Three's deals compare with other networks

SIM card with magnifying glass

Networks

Providers:

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EE logo
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Honest logo
ID logo
IQ logo
Lebara logo
O2 logo
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Sky logo
SMARTY logo
Talkmobile logo
Tesco logo
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