giffgaff SIM only deals
Last updated: 22 October 2026
giffgaff is a UK mobile network running on O2's network, known for its 30-day 'goodybag' plans and community-based support. We list giffgaff's advertised plans side by side so you can compare data, price and commitment before buying direct.
What giffgaff offers
giffgaff's core range is its monthly goodybags: 30-day bundles of data, minutes and texts that you can set to recur or buy one month at a time. It also offers 18-month contracts, which usually include more data for the price in exchange for the longer commitment.
giffgaff runs on O2's UK network, so coverage follows O2's 4G and 5G footprint. Support is mainly online through its member community and agents rather than call centres.
Rolling plan or 18-month contract?
The 30-day goodybags keep you flexible — useful if your usage changes or you want to leave easily. The 18-month contracts tend to offer better value per gigabyte but lock you in, so check the early-exit terms.
Whichever you pick, check your real data usage first so you don't overbuy.
What to check before you buy
Check the current plan details on giffgaff's website: EU roaming allowances, 5G access, and whether any promotional price applies for a limited time only.
Frequently asked questions
Which network does giffgaff use?
giffgaff uses O2's UK network, so its coverage and speeds follow O2's footprint.
What is a goodybag?
A goodybag is giffgaff's name for its 30-day bundles of data, minutes and texts. You can buy them one month at a time or set them to renew automatically.
Does giffgaff require a credit check?
The 30-day goodybags are paid in advance and typically don't need a credit check. The 18-month contracts may involve one.
Can I keep my number with giffgaff?
Yes. Request a PAC code from your current provider and give it to giffgaff when you activate your SIM.
Read more
- Our step-by-step buying guide
- giffgaff's official website
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Listings are dated snapshots of providers' own pages (checked 22 October 2026), not live prices. giffgaff is a trade mark of its owner; CompareDirect is independent and is not endorsed by giffgaff. Always confirm current prices and terms on the provider's website.