Three SIM only deal offers 250GB data for just £10 a month

Get the 250GB SIM only deal from Three for half price for 6 months

Three SIM only deals
(Image credit: Three)

The cost of living crisis is getting harder and harder, especially as we get closer to the festive season. Many monthly costs have risen significantly, including phone contracts, so switching to the best SIM only deals (opens in new tab) can help you save money each month and cut your bills in half.

One of the best mobile phone and network providers to shop for cheap SIM only deals (opens in new tab) is Three. Right now, Three is offering its popular 250GB data SIM only plan for half price for 6 months, as well as its other data plans.

View the 250GB data SIM only plan at Three (opens in new tab)

The 250GB data SIM only deal from Three offers 250GB data, unlimited texts and minutes for just £10 a month. It has no upfront fees and comes with a 24 month Advanced Plan contract length. For this plan, the first 6 months of your contract is half price and once you hit the seventh month, you pay £20 for the remainder of your contract.

If you’re a new Three customer, Three Advanced Plans offer data, texts and minutes, and come with a range of premium extras. These extras include 5G ready at no extra costs, roaming and personal hotspots, and you can use the Three+ rewards apps for exclusive offers at restaurants, cinemas and concert tickets.

All Three SIM only plans (opens in new tab) are half price for 6 months so you can choose how much data you need. Options start from as little as 1GB (currently just £4 a month) all the way up to unlimited data (now £12 a month). To view the 250GB data SIM only plan from Three, click the link above or keep reading for more Three SIM only deals.

250GB data SIM only plan: £20 (opens in new tab)

250GB data SIM only plan: £20, £10 at Three (opens in new tab)
At Three, get the 250GB data SIM only plan at half price for the first 6 months of your 24 month contract. This plan comes with 250GB data, minutes and texts, for just £10 for the first 6 months and £20 for the rest of your contract.

If 250GB isn’t enough for you or it’s too much, Three has many SIM only deals up for grabs at half price for 6 months, including the unlimited data plan and the 100GB data plan. If you want more data, the unlimited data plan is just £12 but if you’re on a tighter budget, choose the 100GB which is currently £8. More details on these plans are below.

Unlimited data SIM only plan: £24 (opens in new tab)

Unlimited data SIM only plan: £24, £12 at Three (opens in new tab)
Get unlimited data from Three with the unlimited data SIM only plan. Now just £12 for 6 months, you get access to unlimited data, texts and minutes with no upfront costs on a 24 month contract length. If you switch to Three from another network, you can get £100 cashback when you choose the unlimited data plan.

100GB data SIM only plan: £16 (opens in new tab)

100GB data SIM only plan: £16, £8 at Three (opens in new tab)
If you don’t need as much data or you’re on a tight budget, the 100GB data SIM only plan from Three is now £8 a month for the first 6 months of your contract. This deal includes 100GB data, unlimited texts and minutes, 5G capability, personal hotspots and roaming.

For more SIM only deals, search through our deals widget below and filter by contract length, data amount and mobile phone provider.

Bethan Girdler-Maslen
Acting Wellness Editor & Deals Writer

As T3's resident Shopping Expert and Deals Writer, Beth covers deals, discount codes, how to save money and seasonal holidays, including Black Friday, Cyber Monday, Amazon Prime Day, Boxing Day and Easter sales. Alongside her primary focus of deals, Beth is currently Acting Wellness Editor, covering all things sleep, yoga, relaxation and general wellbeing.


Having always been passionate about writing, she’s written for websites, newspapers and magazines on a variety of topics, from jewellery and culture, to food and telecoms. You can find her work across numerous sites, including Wedding Ideas Magazine, Health & Wellbeing, The Bristol Post, Fashion & Style Directory and more. In her spare time, Beth enjoys running, reading, baking and attempting DIY craft projects that will probably end in disaster!