Free giffgaff SIM Card
No contracts, member-run network
Updated April 2026 · 3 min read · Reviewed by The Free SIM Cards UK editorial team · Why trust us
What is the free giffgaff SIM?
giffgaff sends a free SIM with £5 credit when you top up. Choose a goodybag each month or just pay-as-you-go.
It runs on O2 (MVNO), giving you 99% UK population (via O2) on 4G and Available in 250+ towns & cities on 5G. Runs on O2 — 99% UK 4G population coverage and 5G in major cities.
The SIM card and UK delivery are completely free (2–3 working days). There's no contract, no credit check, and you only pay if you choose to top up. Best for flexible users who want great value with no commitment. Not sold? Compare it with our Vodafone review or O2 review.
What we like about giffgaff
- £5 free credit when you activate
- Flexible monthly goodybags
- Highly rated by users for value
Where giffgaff falls short
- No phone-based customer service
- 5G availability varies
At a glance
Network host
O2 (MVNO)
Delivery
2–3 working days
SIM types
Triple-cut SIM + eSIM
Contract
None — monthly goodybags
Credit check
Not required
EU roaming
Included (5GB fair-use)
On this page⌄
How to order your free giffgaff SIM
- 1
Click 'Order Free SIM'
You'll be taken straight to giffgaff's order page.
- 2
Enter your UK address
No payment, no card details — just where to send the SIM.
- 3
SIM arrives in the post
Typically 2–3 working days via Royal Mail.
- 4
Pop it in & activate
Follow the leaflet to activate online or by short call.
Free SIM · Free UK delivery · No contract
giffgaff coverage
Runs on O2 — 99% UK 4G population coverage and 5G in major cities.
4G
99% UK population (via O2)
5G
Available in 250+ towns & cities
Host
O2 (MVNO)
Keep your existing number
Switching to giffgaff doesn't mean losing your number. Text the word PAC to 65075 from your current SIM. You'll get a free PAC code within 60 seconds — it stays valid for 30 days. Hand it to giffgaff during activation and your number transfers within one working day.
Our giffgaff rating breakdown
How we tested: We compared giffgaff against the other UK networks on public coverage data, plan pricing, customer reviews and our own delivery test.
Who giffgaff is best for
Flexible users who want great value with no commitment.
Network coverage
Runs on O2 — 99% UK 4G population coverage and 5G in major cities.
giffgaff vs other free UK SIM cards
How giffgaff stacks up against the next 3 best-rated free SIM cards we reviewed.
| Network | Rating | Delivery | Contract | Credit check | EU roaming |
|---|---|---|---|---|---|
| giffgaff (this review) | 4.5 / 5 | 2–3 working days | None — monthly goodybags | Not required | Included (5GB fair-use) |
| Vodafone | 5.0 / 5 | 1–3 working days | None — PAYG or 30-day plans | Not required | Inclusive in most plans (fair-use cap) |
| O2 | 4.9 / 5 | 2–3 working days | None — PAYG or 30-day Big Bundles | Not required | Included in Europe (25GB fair-use) |
| Three | 4.8 / 5 | 1–3 working days | None — PAYG or 1/12/24-month options | Not required | Go Roam in 70+ destinations (12GB fair-use) |
giffgaff free SIM FAQ
The verdict on the giffgaff free SIM in 2026
giffgaff combines genuinely fair pricing with a friendly community vibe. The £5 activation credit is the cherry on top — a brilliant first SIM for almost anyone.
Free SIM · Free UK delivery · No contract
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