giffgaff SIM-only deals

14 plans, sorted by average monthly cost. Checked against giffgaff’s website on 8 August 2026.

giffgaff runs on O2’s network — same coverage, usually for less. Its plans include 5G, eSIM and Wi-Fi calling.

giffgaff

giffgaff runs on O2’s network — same coverage, usually for less. Its plans include 5G, eSIM and Wi-Fi calling.

Show 4 more giffgaff deals — each beaten on price or data by one above

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, monthly rolling). giffgaff sells 14 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?

giffgaff does not raise prices mid-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.

Also using the O2 network

You can get the same underlying coverage from Sky Mobile, Tesco Mobile and O2, although prices, speeds, roaming and customer support differ. See every network on O2 →

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.