Which? customer score
Ofcom complaints
1 per 100,000 customers (average 2)
Network it uses
O2
Owned by
giffgaff Ltd, part of Virgin Media O2 (a 50:50 joint venture of Liberty Global and Telefónica)
Customer service
Online only: Help Hub, community forum (members answer in minutes), agent support via the website/app (weekdays 8am to 10pm, weekends 8am to 8pm) and live chat (added September 2025). No customer service phone line.
EU roaming
Up to 5GB of your UK allowance in EU destinations at no extra cost; travel data add-ons for elsewhere
Contracts
Monthly rolling plans or 18-month plans; also pay as you go. Phones sold on Klarna loans.
Credit check
No credit check on SIM plans (including 18-month plans); phone loans via Klarna are credit checked
Price rises
18-month plans price locked (no mid-contract rises); rolling plans can change with notice
Features
5G: Yes · eSIM: Yes · Wi-Fi calling: Yes · Data rollover: No
Perks
Every giffgaff plan we track
Sorted by what you pay over 12 months.
| Network | Data | Contract | Monthly | 12 months | |
|---|---|---|---|---|---|
| giffgaffRuns on O2 · Monthly rolling | 2GB | Monthly | £6 | £72.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 1GB | Monthly | £6 | £72.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · 18-month price lock. 6GB + 34GB bonus | 40GB | 18 months | £8 | £96.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling | 5GB | Monthly | £8 | £96.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 4GB | Monthly | £8 | £96.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · 18-month price lock. 25GB + 55GB bonus | 80GB | 18 months | £10 | £120.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling | 20GB | Monthly | £10 | £120.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 15GB | Monthly | £10 | £120.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · 18-month price lock. | 50GB | 18 months | £12 | £144.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling | 26GB | Monthly | £12 | £144.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 25GB | Monthly | £12 | £144.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · 18-month price lock. Limited offer, save £11 | Unlimited | 18 months | £14 | £168.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · 18-month price lock. | 100GB | 18 months | £15 | £180.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling | 50GB | Monthly | £15 | £180.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 30GB | Monthly | £15 | £180.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · 18-month price lock. | 200GB | 18 months | £20 | £240.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling, limited offer save £15 | Unlimited | Monthly | £20 | £240.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling | 100GB | Monthly | £20 | £240.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 80GB | Monthly | £20 | £240.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Monthly rolling | 200GB | Monthly | £25 | £300.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 120GB | Monthly | £25 | £300.00 | Go to giffgaff Provider link |
| giffgaffRuns on O2 · Pay as you go goodybag | 200GB | Monthly | £35 | £420.00 | Go to giffgaff Provider link |
Good
- No credit check and no mid-contract price rises on 18-month plans
- Uses the O2 network with 5G included
- Very low Ofcom complaint rate (1 per 100,000 in Q1 2026)
Not so good
- No phone line for customer service; agent replies can take up to 24 hours
- EU roaming capped at 5GB a month
- No data rollover
Uswitch 2026: Best Mobile Handset Contract Network
Other networks on O2
Same masts, so the same coverage. Worth comparing prices.
Sources: giffgaff.com, giffgaff.com, en.wikipedia.org, help.giffgaff.com.