Our pick of giffgaff's best SIM only deals: February 2025

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Check which of giffgaff's choices on SIM only work out best on price this month, compared to other UK mobile networks. Last updated: 13th February 2025.
giffgaff's best SIM only deals
The best overall giffgaff SIM only deal this month

just
£20
a month
✔ Unlimited mins and 120GB data See full deal
at giffgaff.com
(opens in new window)
Looking at all giffgaff's options on SIM only this February, the deal that jumps out to us is their 120GB for £20 one below. It's a 18‑month plan and comes with unlimited minutes and texts too:

Unlimited minutes + Unlimited texts +
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It's a good deal by giffgaff's standards but price-wise you can still beat this plan on other providers (even ones that still use the O2 network). Here are the networks offering it cheaper:

Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + 120GB 160GB data (5G) = £18 £12 a month (12‑month contract)
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + £16 £8 a month for 6 months, then £16 (24‑month contract)
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + 35GB 140GB data (5G) = £15 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 100GB 120GB data (5G) = £25 £15 a month (12‑month contract)
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They're also offering 40GB for £15 on SIM only currently

just
£15
a month
✔ Unlimited mins and 40GB data See full deal
at giffgaff.com
(opens in new window)
For less monthly data, we'd say this is one of giffgaff's best deals on SIM only this month too. It's a 18‑month plan, comes with 40GB data, unlimited minutes and texts for £15 a month:

Unlimited minutes + Unlimited texts +
See full deal
If you're open to joining other networks than giffgaff, you can actually get a similar deal for less, even with providers whose SIMs also use the O2 network. See the networks that beat it here:

Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + 40GB 80GB data (5G) = £10 £8 a month for 15 months, then £10 (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts +
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🛈 Increased to: £9.00 on April 1 2025

Unlimited minutes + Unlimited texts + 25GB 40GB data (5G) = £16 £8 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + £17 £9.99 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 20GB 60GB data (5G) = £10 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + £24 £10 a month (12‑month contract)
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + £20 £12 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + £15 £12.50 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts +
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£10 for 25GB is giffgaff's next best SIM deal in February

just
£10
a month
✔ Unlimited mins and 25GB data See full deal
at giffgaff.com
(opens in new window)
If you need less data, have a look at giffgaff's 25GB SIM below at £10 a month, as it's another good deal. It's on a 18‑month plan and comes with 25GB data, unlimited minutes and texts:

Unlimited minutes + Unlimited texts +
See full deal
While it's good enough to be in our pick of giffgaff's best SIM only deals, other providers do still have similar plans for less, even ones that also use the O2 network. Here are the networks where it'd cost less:

Unlimited minutes + Unlimited texts + £14 £5.99 a month (12‑month contract)
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + 25GB 30GB data (5G) = £16 £7 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + £22 £7.99 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 40GB 80GB data (5G) = £10 £8 a month for 15 months, then £10 (1‑month plan, no contract)
See full deal

Unlimited minutes + Unlimited texts +
See full deal

Unlimited minutes + Unlimited texts +
See full deal
🛈 Increased to: £9.00 on April 1 2025

Unlimited minutes + Unlimited texts +
See full deal

Unlimited minutes + Unlimited texts + 20GB 30GB data (5G) = £9.90 a month (1‑month plan, no contract)
See full deal

Unlimited minutes + Unlimited texts + 20GB 60GB data (5G) = £10 a month (1‑month plan, no contract)
See full deal

Unlimited minutes + Unlimited texts +
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Unlimited minutes + Unlimited texts + £16 £10 a month (12‑month contract)
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Compare all SIM only plans
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How giffgaff's deals compare with other networks

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More about giffgaff's SIM only plans
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