Best giffgaff SIM deals: 20GB for £10, 26GB for £12
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See how giffgaff compare on price this month vs the competition on SIM only. We've checked each of their plans to find the best. Last updated: 5th June 2026.
giffgaff's best SIM only deals
The best overall SIM only deal this month on giffgaff
just
£10
a month
✔ Unlimited mins and 20GB data See full deal
at giffgaff.com
(opens in new window)
Out of all the SIM only plans available this June on giffgaff, we'd say their best value deal is their discounted 1‑month SIM below, which gets you 20GB data, plus unlimited minutes and texts for £10 a month:
In comparison to the rest of giffgaff's current SIM only plans, it's one of the best. But it is beatable on price, even if you're set on joining a provider that uses the O2 network. Here's where you can beat it on other networks:
Their 26GB for £12 SIM is another good option
just
£12
a month
✔ Unlimited mins and 26GB data See full deal
at giffgaff.com
(opens in new window)
To get more data, giffgaff are also offering this discounted £12 SIM, which includes 26GB data, unlimited minutes and texts on a 1‑month plan. It's another of their best deals:
It does enough to get into our pick of giffgaff's best SIMs but that doesn't mean it's unbeatable on price. Other providers (even ones that use the O2 network) can beat it. See lower-priced networks' deals here:
giffgaff's 50GB for £15 plan is a good option too
just
£15
a month
✔ Unlimited mins and 50GB data See full deal
at giffgaff.com
(opens in new window)
For people who need even more data, you might like the discounted £15 SIM only deal running on giffgaff at the moment. It's a 1‑month plan, which comes with 50GB data, unlimited minutes and texts too:
Compared to giffgaff's other deals, this comes out among the best. But it's worth knowing you can get a lower price elsewhere, even on other providers that use the O2 network. Here are other networks you can beat it on:
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How giffgaff’s benefits and SIM only prices stack up
In our full review of giffgaff we said we like that they offer full access to O2’s 5G/4G/3G/2G network at much lower costs than joining O2 directly. They also have a nice free WiFi hotspot scheme on top of that.
giffgaff market their SIM only deals (their “goodybags”) as monthly bundles of minutes, texts and data with no contracts. Compare their plans here to find the best possible deal.
Their best value plans are their mid-range data deals. For these they work out as one of the cheapest providers on the O2 network.
giffgaff still offer inclusive EU roaming on all plans at no extra cost. And you can get £5 free credit on your first £10 top up or bring a friend onto giffgaff to both get £5 free credit.
Useful link: Read our full giffgaff review
What else you should know about giffgaff’s SIM only plans
You’ll receive your SIM package within 2 working days. And you can even have it delivered in the EU within 3-5 days and beyond the EU around 5+ days after you order. giffgaff don’t offer eSIMs (these networks do).
If you’re not happy with your SIM you can return it to get a refund within 14 days. But you only get a refund on what you haven’t used, so you won’t get a full refund if you used some data (read more here).
Since you’re paying for your minutes, texts and data up front then you won’t have to pass a credit check for their SIM only plans. You’ll just have to give them some details so they know who you are.
If you want to switch to giffgaff from another network while keeping your old number you’ll have to request a PAC from your old provider to give to giffgaff. You can read their instructions on how this works here.
Useful link: Compare all giffgaff SIMs