All 9 UK Networks u2014 Side by Side

Network	Type	4G	5G Coverage	EU Roaming	Rating	Guide
O2	MNO	99%	~70%	✓ Free — all plans	4.4	Guide →
Three	MNO	99%	~62%	Value/Complete only	4.5	Guide →
EE	MNO	99%	87%+	Essentials Plus+	4.6	Guide →
Vodafone	MNO	99%	Growing	Xtra only	4.1	Guide →
Tesco Mobile	MVNO	99%	Via O2	✓ Free most plans	4.7	Guide →
Sky Mobile	MVNO	99%	Via O2	Check per plan	4.2	Guide →
Lebara	MVNO	99%	Via Vodafone	✓ Free (EU+India)	4.3	Guide →
iD Mobile	MVNO	99%	Via Three	✓ 50 dest (eligible)	4.3	Guide →
Giffgaff	MVNO	99%	Via O2	Varies by goodybag	4.2	Guide →

Data reflects June 2026 publicly available information. Always verify directly with each network before making any decision.

Best network by priority

Free EU roaming on every plan

O2 — only major MNO. Also: Tesco Mobile (same network, usually cheaper), Lebara (EU + India 30GB), iD Mobile (50 destinations on eligible plans).

Fastest 5G

Three — 140MHz spectrum, ~187Mbps median (Opensignal Jan 2026). EE leads for widest geographic 5G coverage at 87%+.

No annual price rises

Tesco Mobile (Clubcard Price plans), iD Mobile (SIM Only), Lebara, Giffgaff (rolling goodybags).

Free international calls

Lebara — 50+ countries including India, Pakistan, USA, Nigeria on every plan, no add-on.

No contracts at all

Giffgaff — monthly goodybags, pause or cancel anytime, no exit fees.

Best customer satisfaction

Tesco Mobile — Ofcom #1 multiple times, Uswitch Best Customer Service 5 consecutive years.

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Wiseclearwise (wiseclearwise.online) is a fully independent consumer information and guidance website. We hold absolutely no affiliation, partnership, commercial agreement, endorsement, or operational connection with O2, Three UK, EE, Vodafone, Tesco Mobile, Sky Mobile, Lebara, iD Mobile, Giffgaff, or any of their parent companies including Virgin Media O2, VodafoneThree, BT Group, Sky UK (Comcast Inc.), Tesco plc, Currys plc, Lebara Group, or Telefónica UK. Wiseclearwise does not sell SIM cards, mobile contracts, or handsets of any kind. We do not access customer accounts, handle billing disputes, process payments, manage upgrades, or provide official technical support for any network. All plan details, pricing, features and promotions change frequently — always verify current information directly on the relevant network's official website before making any purchasing decision. Network names, logos and trademarks referenced on this website are the property of their respective owners and are used solely for the purpose of independent consumer information and identification. Wiseclearwise operates as an independent third-party consumer guidance service under UK consumer information guidelines.

All 9 UK Networks — Side by Side