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giffgaff SIM-only deals

8 giffgaff SIM-only plans, cheapest first — prices, roaming and features all checked against giffgaff’s own site.
Runs on O2 MVNO · O2's coverage Checked Jul 2026
5G · eSIM · EU roaming · Wi-Fi calling · No mid-contract price rises

giffgaff is a SIM-only network that piggybacks on O2’s masts, so its coverage and signal match O2’s — usually at a lower price. Plans run from 30-day rolling up to 12-month SIM-only deals and unlimited data starts at £14/mo. Prices are frozen with no mid-contract rises, EU roaming is included on most plans and 5G and eSIM come as standard.

giffgaff SIM-only deals

8 giffgaff plans, cheapest first. Prices checked against giffgaff's own site — these are the ongoing monthly costs, not introductory rates.

Cheapest giffgaff plan is £6.00/mo. giffgaff runs on O2's network — compare it against every other provider using the same masts.

giffgaff FAQ

How much is giffgaff?

The cheapest giffgaff SIM-only plan is £6.00/mo (2GB, 30-day rolling). giffgaff sells 8 plans in total, and we check every price against giffgaff's own site.

What network does giffgaff use?

giffgaff is an MVNO: it runs on O2's masts, so you get the same signal and coverage as O2, usually at a lower price.

Can I use giffgaff abroad in the EU?

giffgaff includes EU roaming. You can use up to 5GB of your allowance in the EU at no extra cost.

Does giffgaff have 5G?

Yes — giffgaff includes 5G. Plans include 5G speeds at no extra cost on the O2 network.

Does giffgaff support eSIM?

Yes — giffgaff supports eSIM.

Does giffgaff put prices up mid-contract?

Yes — giffgaff raises prices during your contract. Contractually guarantees no mid-contract price rises on its 18-month SIM-only plans (sign-ups before the end of 2026). 30-day rolling plans carry no guarantee, but you can leave any time.

Compare all UK networks side by side →

Feature and price data is checked by Scrimpr against giffgaff's own site and public documentation. Networks change plans often — always confirm details on the provider's site before buying. Some links are affiliate links (marked *), which support Scrimpr at no cost to you.