Worth knowing: this page isn't run by Three Mobile or its parent company. For anything account-specific, you'd need to go through Three's own channels.
799/1,000
independent score
Three started out in 2003 as the UK's first fully 3G network, and since 2025 has shared infrastructure with Vodafone under the VodafoneThree umbrella. What it's still best known for is Go Roam — a roaming allowance that goes further afield than most of its rivals offer.
Plans on offer
Three SIM only splits into a few tiers depending on roaming.
- Lite skips roaming entirely and costs the least
- Value adds Go Roam Europe — 49 destinations
- Pay monthly runs over 24 months; PAYG needs no credit check at all
Signal and speed
Independent labs, not Three's own marketing.
- Recorded some of the fastest peak 5G speeds of any UK network
- Sits third overall in 2026's independent rankings at 799/1,000
- New sign-ups from April 2026 face a speed ceiling — more in our Coverage guide
Going abroad
Three's headline feature, tiered by plan.
- Europe tier: 49 places included
- Around the World: 71 places
- Top tier reaches 163 destinations, capped at 12GB and 3,000 minutes a month
Moving on or in
Same Ofcom rules as everywhere else.
- PAC to 65075 keeps your number when you leave
- STAC to 75075 closes the account without porting
- INFO to 85075 tells you what's left on your current deal
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