Budget & virtual networks
Britain's budget mobile brands rent their coverage from the big four. The host table below is the single most useful fact about any of them.
Who runs on whose masts
Budget brands own no masts — the host network underneath decides your coverage entirely.
| Brand | Host masts | Signature |
|---|---|---|
| Tesco Mobile | O2 | Satisfaction-survey regular; family controls |
| giffgaff | O2 | No contracts; community-run support |
| Sky Mobile | O2 | Data Roll piggybank |
| SMARTY | Three | Radically simple one-month plans |
| iD Mobile | Three | Value monthly plans |
| VOXI | Vodafone | Social apps that don't burn data |
| Lebara | Vodafone | International minutes built in |
| 1pMobile | EE | Pay-per-use pricing |
Hosts as generally understood at July 2026 — arrangements can change; confirm with each brand.
The three rules
The mast decides; the marketing doesn't. Method: coverage guide.
Wi-Fi Calling, eSIM and 5G access differ between brands on identical masts — never assume parity with the host.
Always with the brand. A Tesco Mobile problem is Tesco Mobile's helpdesk, even though every bar of signal is O2's.
Why people switch to them
- Much lower prices on the same physical networks
- Short or no contracts — perfect for coverage testing
- Specialist perks: data banking, international minutes
What you trade away
- Possible slower speeds at the busiest cells
- New features arrive after the host gets them
- Support is app/online-first on several brands
Want to talk it through?
Our helpline answers general questions about anything in this hub — switching, coverage, complaints, staying safe. We can't open accounts, take payments, or act for any network.
0330 059 7117 Standard UK rate · usually free within inclusive minutes · we never ask for passcodes, banking or card details