Compare giffgaff SIM Only Deals

giffgaff uses O2's network for calls, texts and data, so coverage matches O2 in your area. 5G is included on most current plans where O2 has 5G. Coverage is the most important thing to check before you switch, so confirm O2 signal at your home and workplace first.

giffgaff offers three options. Its 30-day rolling plans renew each month and can be changed or cancelled at any time, which suits people who want flexibility. Its 18-month plans are better value and tend to include more data for the price, in return for a longer commitment. Pay as you go is also available if you would rather top up. The live deals above show which plans are currently on offer.

giffgaff carries no scheduled mid-contract price rise in its deal terms. See which other networks do the same in our guide to SIM only price rises.

EU roaming is included with fair-use limits, so you can use your allowance across much of Europe at no extra cost. eSIM is supported on compatible phones, so you can set up without a physical SIM. giffgaff also runs Payback, which rewards members for activity, and has an active member community for support alongside its online help.

giffgaff suits people who want O2 coverage without a long contract, and who are happy to manage their plan online. The 30-day plans are good for anyone whose usage changes month to month, while the 18-month plans work for heavier users who want more data for less. It is less suited to people who prefer phone or in-store support, as giffgaff is online-first.

giffgaff, Tesco Mobile and Sky Mobile all run on O2's network, so coverage is similar between them. They differ on perks and terms: Tesco Mobile offers Clubcard points and a range of contract lengths, Sky Mobile rolls over your unused data, and giffgaff leads on flexible 30-day plans. Compare them on price and the features that matter to you.