Three SIM only deals compared
Typical Three SIM only prices run from £13 to £35 a month on a 24-month contract, depending on how much data you get.
Source: BillsSorted price snapshot, October 2026
Typical prices are taken from providers' own websites, collected on 18 October 2026. Prices change often, so use the comparison below to see the latest deals.
How much is Three SIM only?
| Data each month | From | Most plans |
|---|---|---|
| Up to 5GB | £13 | £16 to £21 |
| 5 to 30GB | £14 | £15 to £24 |
| 30 to 100GB | Not available when checked | |
| Over 100GB | £16 | £21 to £28 |
| Unlimited | £22 | £30 to £35 |
Source: BillsSorted price snapshot, collected 18 October 2026
What's included
Three's plans come in Lite, Value and Complete tiers, all with 5G at no extra cost. Value includes roaming in 49 European destinations and Complete in over 160 worldwide, both with fair use limits. Lite plans need a roaming add-on or pay a daily charge.
Source: Three, Three Your Way, checked 13 October 2026
Three's price rise explained
If you joined Three from 9 November 2025, your monthly price goes up on 1 April by £1.80, £1.90 or £2.30 depending on your data allowance. If you joined between 8 September 2024 and 8 November 2025, it's £1.00 to £1.50. Older contracts may have a percentage rise.
Source: Three, Changes to your Monthly Charge (joined from 9 November 2025), checked 13 October 2026; Three, Changes to your Monthly Charge (joined 8 September 2024 to 8 November 2025), checked 13 October 2026
Coverage
Every network has at least 99% 4G coverage outside UK premises. 5G coverage outside premises ranges from 76% to 94% depending on the network.
Check coverage at your postcode with Ofcom's mobile checker.
Source: Ofcom, Connected Nations update: Spring 2026, data as of January 2026, published 13 May 2026
Which brands use the Three network?
SMARTY and iD Mobile use the Three network. They use Three's signal but set their own prices, plans and customer service, so their deals can differ from Three's own.
Since Three and Vodafone merged in 2025, brands on either network can use both networks in upgraded areas. Talkmobile, which uses Vodafone's network, can also use Three's.
Which smaller brands use the Three network
Source: SMARTY, What does Three's merger with Vodafone mean for SMARTY?, checked 13 October 2026; iD Mobile, VodafoneThree merger, checked 13 October 2026; Talkmobile, Network, checked 13 October 2026
Leaving Three and keeping your number
Three needs your date of birth in the text
Text PAC followed by your date of birth as DDMMYY, to 65075. For example, PAC060385 if you were born 6 March 1985.
How to get your PAC code from Three
Source: Ofcom, Switching mobile phone provider, updated 25 August 2026; Three support: How to get a PAC or STAC code when leaving Three, checked 8 October 2026
Compare Three deals
Deals come from our comparison partners.
Some providers pay for higher placement in the Featured order.
Sources and dates
- BillsSorted price snapshotAs of October 2026Typical Three SIM only prices by data amount, from Three's own website.
- Ofcom, Pricing and consumer engagement: Trends in the UK communications sectorPublished 26 February 20262026 price rises on new mobile contracts.
- Ofcom, Communications Market Report 2026Published 30 June 2026, data for 2025In 2025 the average UK mobile data user got through 11.8GB a month.
- Three, Three Your WayChecked 13 October 2026What Three SIM only plans include.
- Three, Changes to your Monthly Charge (joined from 9 November 2025)Checked 13 October 2026Three's yearly price rise during a contract.
- Three, Changes to your Monthly Charge (joined 8 September 2024 to 8 November 2025)Checked 13 October 2026Three's yearly price rise during a contract.
- Ofcom, Connected Nations update: Spring 2026Published 13 May 2026, data as of January 20264G and 5G coverage outside premises, across the networks.
- SMARTY, What does Three's merger with Vodafone mean for SMARTY?Checked 13 October 2026SMARTY uses the Three network, and the merger with Vodafone.
- iD Mobile, VodafoneThree mergerChecked 13 October 2026iD Mobile uses the Three network, and the merger with Vodafone.
- Talkmobile, NetworkChecked 13 October 2026Talkmobile uses the Vodafone network, and can use Three's.
- Ofcom, Switching mobile phone providerLast updated 25 August 2026The PAC text code for keeping your number.
- Three support: How to get a PAC or STAC code when leaving ThreeChecked 8 October 2026How to get a PAC code from Three.
Figures on this page are a guide, not advice. They show typical prices for new deals, not what is right for you. Prices and rules change often, so check the details with the provider before you decide. Typical prices are taken from providers' own websites, collected on 18 October 2026. Prices change often, so use the comparison to see the latest deals.