Three UK – 2025 Review & SIM-Only Deals
Find out why Three UK continues to be one of the most popular full-network mobile providers for SIM-only plans — combining strong 5G coverage, competitive pricing, and unlimited data options for every kind of user.
Compare flexible 30-day, 12-month and 24-month plans below — and pick the one that fits your data needs.
Updated: 07 November 2025
Overview
Three UK (Hutchison 3G UK Ltd) is a major network operator with more than 10 million customers and extensive 4G/5G coverage across the UK. Known for data-heavy packages, simple pricing, and strong 5G rollout, Three has earned a reputation for delivering value to both light and heavy data users.
Three offers a complete range of SIM-only plans with unlimited UK calls & texts, generous data allowances, and inclusive roaming in 71 destinations. All plans are 5G ready at no extra cost, and the network’s fast data speeds make it ideal for streaming, gaming and hot-spotting.
Network & Coverage
Three’s network covers 99% of the UK population for 4G and has rolled out 5G to over 650 towns and cities.
Independent tests rank Three among the top networks for average 5G download speed and coverage growth.
Users benefit from:
Widespread 5G availability in major urban areas.
Unlimited data compatibility for mobile hotspots and tethering.
EU roaming included in most plans (up to 12 GB fair use limit).
As with any network, performance can vary by location, so checking Three’s coverage map before you switch is recommended.
Plans & Pricing Structure
a) Contract flexibility & pricing
Choose from 30-day rolling, 12-month, or 24-month plans.
Prices start at around £6–£8/month for smaller data allowances.
Unlimited data plans remain some of the best-value on a major UK network.
All plans include unlimited minutes and texts, plus 5G access as standard.
b) Data allowances & extras
Plans range from 8 GB, 30 GB, 60 GB, and 120 GB up to Unlimited data.
Three+ Rewards app offers discounts on brands and events.
Personal Hotspot usage is included on all data plans.
Wi-Fi calling & VoLTE come standard for better indoor coverage.
c) Suitability & value
Three’s SIM-only deals are perfect for:
Heavy data users (streaming or tethering devices).
Students and budget seekers wanting major-network quality at low cost.
Travellers who value EU roaming inclusion.
Families and multi-device users sharing large data bundles.
SIM-Only Deals
Who Are These Mobile Plans Best For?
Key details to know
Before switching or ordering a SIM, here are some important details that help you get the most out of Three Mobile:
Network: Three operates its own core 5G network in the UK.
Contract types: Rolling 30-day or fixed 12/24-month terms.
Roaming: EU roaming included (up to 12 GB limit).
Tethering: Allowed on all plans.
Fair use: Data capping applies when abroad.
Price rises: Annual CPI + 3.9% increase in April for some plans.
Customer service: Online chat and call centres; Three Store presence nationwide.
Number porting: Keep your number by requesting a PAC from your old provider.
Final Verdict
Three UK SIM-Only Deals 2025 deliver one of the best balances of speed, value and data freedom on a major network.
If you rely on mobile data daily — for streaming, hot-spotting or remote work — Three’s unlimited plan offers top-tier performance at a competitive price.
For light users or families, the smaller plans still provide excellent coverage and cost efficiency.
Overall, Three remains a trusted UK operator with genuine 5G reach and straightforward pricing — making it a strong choice in 2025.