Three’s 6 month half price SIMs can be beaten… by Three
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Join Three directly and still get a better deal than the 6 months half price offers running on their 24 month SIM only contracts. We show you how. Last updated: 20th October 2025.
Three’s 6 month half price SIM deals
Most of Three’s 24-month SIMs have a half price offer
If you’ve been browsing Three’s 24 month SIM only contracts, you’ve probably seen that most of them are available with 6 months half price, or even more if you’re looking at Value or Complete plans:
They are genuine discounts against the full price. Three haven’t jacked up the main price to offset the cost of giving you the cheaper months.
But even so, we have a range of exclusive plans that not only work out cheaper over your whole contract but also mean you’re not paying excessively, once you’re out of contract.
In this guide, we show you our workings for each of the plan types, so you can see for yourself!
6 month half price Lite plans are beatable
Choose one of the dropdowns to see how our exclusives compare against the main offers:
Three’s 25GB 24-month Lite plan is £7 for 6 months, then £14. Over the course of the 24 months, that averages out to £12.25 a month (ignoring mid-contract price rises):
Yet we have this exclusive deal that is just £7 for your whole contract (plus planned price rises):
Next we can comfortably undercut this deal, which works out to an average of £14 over the course of your entire 24-month contract (ignoring price rises):
Yes, this exclusive plan starts off more expensive but it quickly undercuts the 24-month offer:
And lastly, we can beat this 250GB offer, which is the equivalent of £19.25 a month when spread out over 24 months:
Our exclusive comes in at just £16 a month: