Three UK is now part of VodafoneThree following the merger completed 31 May 2025, approved by the CMA in December 2024. Founded in 2003 by CK Hutchison Holdings as the UK's first all-3G network, Three grew into the unlimited-data specialist — launching 'The One Plan' (unlimited data) in 2010, years before rivals. Three holds more 5G spectrum than any other UK operator (140MHz in 3.4–3.6GHz) and consistently leads independent 5G speed tests.
We don't list live prices — they change frequently. Below we explain how each plan type works.
Three SIM Only plans (June 2025 restructure): Lite (no roaming, cheapest), Advanced, Value (Go Roam Europe: 49 destinations), Complete (Go Roam worldwide: 160+ destinations, Paramount+ included). All include unlimited calls and texts, 5G free, personal hotspot. Annual price rise: £1.80–£1.90/month each April (30-day rolling plans exempt).
Three Pay Monthly plans bundle handsets (iPhone, Samsung, Google Pixel) with airtime on 24 or 36-month device plans. Higher tiers add Go Roam. Three+ loyalty perks available. Can pay off device early and switch to SIM Only.
Three PAYG uniquely includes Go Roam in 71 destinations at no extra cost — one of the best PAYG roaming deals in the UK. Add-on packs valid 30 days. No credit check required. eSIM available on PAYG.
Three supports eSIM on iPhone XS+, Samsung Galaxy S20+, Google Pixel 3+. Activate via the Three app or QR code. eSIM Quick Transfer available on iPhone. PAYG eSIM also available.
Three provides 99% population 4G coverage. 5G covers approximately 62% of the population across 450+ towns — but Three holds the most 5G spectrum and achieves the fastest 5G speeds. Under VodafoneThree, £11 billion pledged to reach 99% 5G Standalone coverage by 2030. Network sharing with Vodafone (MOCN) already active.
Three's Go Roam: Value tier = 49 EU destinations; Complete tier = 160+ worldwide destinations (USA, Canada, Australia, India, UAE, and more). 12GB fair-use monthly data cap while roaming. PAYG customers get 71 destinations free.
Three holds more 5G spectrum than any other operator — leads independent speed tests every year.
Complete tier reaches 160+ worldwide destinations. PAYG includes 71 destinations free.
True unlimited data, no speed caps on eligible plans. UK's original unlimited network.
Complete plans include a Paramount+ subscription at no extra cost.
Loyalty rewards via the Three+ app — food, drinks, entertainment.
Full eSIM support including iPhone's Quick Transfer feature.