If you’ve been shopping around for a new phone contract or SIM-only deal, chances are you’ve come across Three. It’s one of the UK’s big four mobile networks, alongside EE, Vodafone, and O2 — and it also powers smaller providers like SMARTY and iD Mobile.
But the real question is: is it actually any good?
What Three Does Really Well
Unlimited data
This is where Three stands out. Unlike some rivals that sneak in speed caps or limits, Three’s unlimited plans are genuinely unlimited. If you’re someone who streams Netflix on the go, hot-spots your laptop, or plays online games, it’s a massive plus.
Fast, widespread 5G
Three’s 5G coverage has expanded quickly, and in a lot of independent tests it comes out as one of the fastest in the UK. And the best part? It’s included at no extra cost.
Roaming perks
Three’s Go Roam feature lets you use your plan abroad in over 70 destinations, including the USA and Australia. Most networks only cover the EU, so this is a big win if you travel.
Rewards and extras
Three also has the Three+ app, which gives you discounts on things like food, cinema tickets, and live events. It’s not a reason to pick Three on its own, but it’s a nice bonus.
Phone contracts
Unlike MVNOs such as SMARTY, Three sells the latest phones on contract — from iPhones and Samsungs to Google Pixels — with finance options that can spread the cost.
Three Lite SIM Only
Three Lite SIM Only
Three Lite SIM Only
Three Lite SIM Only
Three Lite SIM Only
Three Lite SIM Only
Where Three Could Do Better
Of course, it’s not perfect.
- Coverage in rural areas can sometimes lag behind EE and Vodafone. In big towns and cities, it’s great, but in the countryside you might find the signal less reliable.
- Roaming isn’t always free. While Go Roam covers loads of countries, there’s now a small daily charge for using your UK allowance abroad in many destinations.
- Customer service has had mixed reviews. It’s improving, but EE and O2 tend to score higher in satisfaction surveys.
Who Three Is Best For
Three is a fantastic option if:
- You’re a heavy data user who hates limits.
- You travel abroad regularly and want roaming beyond Europe.
- You like having the choice of contract phones as well as SIM-only plans.
- You want a balance of good value and big-network features.
If you just want the absolute cheapest SIM with no extras, something like SMARTY (also powered by Three) could be a better fit. But if you want the full package — unlimited data, roaming perks, and a shiny new phone if you fancy it — Three itself is hard to beat.
The bottom line:
Yes, Three is good — especially for people who live in towns or cities, love using data, and travel often. It may not be perfect in rural coverage or customer service, but for most users, it’s one of the strongest options out there.