What is the cheapest mobile plan in the UK?

GiffGaff and Smarty offer the best value SIM-only deals from £6-10/month. Both use major networks (O2 and Three) with 30-day rolling contracts.

Is 5G worth paying extra for?

5G is worth it if you're in a covered area and need fast speeds on the go. Voxi and Three offer affordable 5G plans. Coverage is still expanding outside major cities.

SIM-only or contract — which saves more?

SIM-only almost always saves money — buy your phone outright (or refurbished) and pair with a cheap SIM. You'll save £200-400 over a 2-year contract.

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📱 5 Providers · Instant Comparison

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£6/mo

Cheapest plan

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5G available

🟢 EE3️⃣ Three💡 Smarty📱 Voxi🤝 GiffGaff

Visit Provider — Get Your Quote

EE

★

UK's fastest network. Best 5G coverage and premium perks.

Best NetworkVisit EE →

Three

Cheapest unlimited data plan with 5G included.

Best UnlimitedVisit Three →

Smarty

Cheapest SIM-only plans. Month-to-month, no lock-in.

CheapestVisit Smarty →

Voxi

Endless social media data. No credit check, no contract.

Best Under 30sVisit Voxi →

GiffGaff

Community-powered mobile on O2's network. Refer-a-friend rewards.

Community FavouriteVisit GiffGaff →

Sento is an independent comparison service. Prices shown are indicative and may vary by location and usage. We may receive a commission if you switch via our links. This does not affect our editorial independence.

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