Checked 15 Oct 2026
SIM only · Providers
giffgaff SIM only deals and prices
Budget brand on the O2 network, best known for monthly rolling plans.
- Network
- O2
- Contract
- 1-month rolling or 18 months
- Rises on contracts
- Fixed for the whole contract
- EU roaming
- Included
- Data
- 20GB to unlimited
- Ofcom complaints
- 1 per 100,000 (average 2)
What to watch for
- Rolling plans can change price at any time, with notice. You can leave without a fee.
- The 18-month contracts have no mid-contract rises if bought before the end of 2026.
giffgaff SIM-only deals
6 deals
giffgaff
80GB 18-month
- 80GB data
- 18 months
- O2 network
25GB plus 55GB extra free, if activated by 30 October.
Check O2 coverage at your postcodeChecked 15 Oct 2026
Checked 15 Oct 2026
Checked 15 Oct 2026
Checked 15 Oct 2026
giffgaff
Unlimited rolling
- Unlimited data
- 1-month rolling
- O2 network
Checked 15 Oct 2026
What happens when you click View deal: you go to the provider's own site to check your address and order. Your contract and any problems with installation or billing are with the provider. MoneyRoute never takes payment or your details.
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Compare giffgaff with other providers at the same data allowance: Up to 20GB SIM only deals · 20GB to 99GB SIM only deals · 100GB+ SIM only deals · Unlimited SIM only deals
giffgaff offers and promo codes
- 80GB 18-month: 25GB plus 55GB extra free, if activated by 30 October.
Promo codes: we don't list them, because SIM only discounts are usually built into the advertised price rather than unlocked with a code. Codes on voucher sites are often expired or for other products.
Already with giffgaff? These prices are for new customers. Near the end of your contract, giffgaff will often offer a similar price to keep you, so compare it with the deals above before you agree.
About giffgaff
giffgaff is owned by Telefónica UK, part of Virgin Media O2, and runs on O2's network.
It had about 4.26 million mobile members in its latest accounts.
Members can earn 'Payback' for referring friends and helping in the giffgaff community, paid as cash, credit or a charity donation.
What you get with giffgaff
- Unlimited UK calls and texts and 5G at no extra cost.
- Tethering on all plans, Wi-Fi Calling and eSIM on compatible phones.
- Up to 5GB of your allowance in the EU at no extra cost.
giffgaff contracts and getting started
- giffgaff offers monthly rolling plans you can change or cancel any time, and 18-month contracts.
- 18-month contracts need no credit check. Ending one early costs half the monthly price for each full month left.
- No mid-contract price rises on 18-month contracts bought before the end of 2026.
- SIMs usually arrive in 1 to 2 working days.
How giffgaff compares
giffgaff's top-ranked deal, 20GB rolling, against the best deal from each other provider in the same data range (Up to 20GB), by monthly price.
| Provider | Deal | Monthly price | Contract |
|---|---|---|---|
| giffgaff | 20GB rolling | £10/mo | Rolling |
| Talkmobile | 10GB 30-day | £5.95/mo | Rolling |
| SMARTY | 5GB | £6/mo | Rolling |
| iD Mobile | 10GB 1-month | £6/mo | Rolling |
| VOXI | 20GB + unlimited social | £10/mo | Rolling |
| Vodafone | 5GB | £19/mo | 24 months |
On the same network as giffgaff: O2.
giffgaff customer service and complaints
Ofcom received 1 complaints for every 100,000 giffgaff pay-monthly mobile customers in January to March 2026, fewer than the average of 2.
| Ofcom measure (2024) | giffgaff | Average |
|---|---|---|
| Satisfied with service overall | 94% | 88% |
Support comes through in-app chat, an AI help bot that can hand over to an agent, and the member community.
Sources: Ofcom telecoms complaints (January to March 2026, published 23 July 2026) · Ofcom: comparing customer service (2024 data)
giffgaff SIM only questions
How much does giffgaff SIM only cost?
The cheapest giffgaff deal we list is 20GB rolling at £10 a month on a rolling plan. The 6 giffgaff deals we list range from £10 to £35 a month.
Does giffgaff put prices up mid-contract?
Not on the giffgaff contracts we list: the price is fixed for the minimum term.
Does giffgaff include EU roaming?
Yes, every giffgaff plan we list includes EU roaming. Fair use limits apply; see each plan.
What network does giffgaff use?
giffgaff runs on O2's network, so coverage is the same as O2's. Other brands on the same network include O2.
Are there giffgaff promo codes?
We don't list promo codes, because SIM only discounts are usually built into the advertised price rather than unlocked with a code. Every current giffgaff price we list is above, checked against giffgaff's own site.
Can existing giffgaff customers get these deals?
Usually not directly: these prices are for new customers. Near the end of your contract, giffgaff will often offer you a similar price to stay, so compare it with the deals above before you agree.
How do I switch to giffgaff?
Order a SIM or eSIM from giffgaff. To keep your number, text PAC to 65075 from your current phone, then give the code to giffgaff; your number usually moves within one working day, and your old contract ends when it does. Check whether you'll owe an exit fee before you switch.
Other SIM only providers
Sources, checked October 2026: giffgaff.com · giffgaff.com · giffgaff.com · giffgaff.com · help.giffgaff.com · ispreview.co.uk