Network vs network
O2 vs Vodafone
Different masts, different deals. We compare price rises in pounds, roaming, credit checks and today’s cheapest SIMs on both.
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Do they use the same masts?
No. O2 uses its own masts and Vodafone uses its own masts. Check coverage at home and work for both.
Which one raises prices?
O2: +£2.50 every April. Vodafone: +£2.50 every April (Basics +£1.50).
Which is better abroad?
O2: EU included, 25GB. Vodafone: £2.75 a day in Zone B unless included.
O2£228
Vodafone£660Cheapest SIM with 10GB or more × 24, plus April rises
Live prices; rises estimated for a plan starting this month.
Over 24 months, the cheapest 10GB+ SIM costs £228 on O2 and £660 on Vodafone once April rises are added — O2 is £432 cheaper. O2 runs on its own masts; Vodafone on its own masts.
Prices checked 28 October 2026 · facts checked monthly · How we compare
O2 vs Vodafone, side by side
| O2 | Vodafone | |
|---|---|---|
| Masts | Own masts | Own masts |
| Annual price rise | +£2.50 every April | +£2.50 every April (Basics +£1.50) |
| Roaming | EU included, 25GB | £2.75 a day in Zone B unless included |
| Credit check | Hard check | Hard check |
| eSIM | Yes | Yes |
| Wi-Fi Calling | Yes | Yes |
| Ofcom complaints per 100k (Q1 2026) | 3 | 1 |
| Cheapest SIM, 10GB+ | £7 a month | £7 a month |
| Cheapest SIM, 30GB+ | £8 a month | £8 a month |
| Cheapest SIM, Unlimited | £23 a month | £26 a month |
Highlighted = better on that line. Facts from network terms and Ofcom; prices live.
Our verdict
On price, O2 comes out ahead for a typical 10GB+ SIM: £432 less over two years once April rises are counted (O2 rises add about £60, Vodafone’s about £60).
Coverage differs: O2 uses its own masts and Vodafone uses its own masts. Check both on the mast owner’s postcode checker for home and work before you decide.
Pick O2 if…
- You want the lower 24-month cost for a 10GB+ SIM
- O2’s own masts are strongest where you live
O2 and Vodafone SIM only deals, live
FAQ
O2 vs Vodafone questions
Is O2 or Vodafone cheaper?
O2, today: the cheapest 10GB+ SIM costs £7 a month, and over 24 months with April rises the gap is £432.
Do O2 and Vodafone use the same network?
No. O2 uses its own masts and Vodafone uses its own masts.
Which has better roaming?
O2: EU included, 25GB. Vodafone: £2.75 a day in Zone B unless included.
Can I switch from O2 to Vodafone and keep my number?
Yes. Text PAC to 65075 from your O2 phone, give the code to Vodafone, and the number moves within one working day.