O2O2
Uses O2 network
monthly rolling
O2 SIM-only deals
17 plans, sorted by average monthly cost. Checked against O2’s website on 17 August 2026.
O2 runs its own UK network. Its plans include 5G, eSIM and Wi-Fi calling.
O2
O2 runs its own UK network. Its plans include 5G, eSIM and Wi-Fi calling.
O2O2O2
Uses O2 network
monthly rolling
30GB Data5G
Unlimited minutes & texts
O2O2
Uses O2 network
monthly rolling
50GB Data5G
Unlimited minutes & texts
O2O2
Uses O2 network
24-month contract
£18.00/mo
until 31 March 2027
- Then £20.50 a month from 1 April 2027 until 31 March 2028
- Then £23.00 a month from 1 April 2028
- £482.00 total over 24 months
- Average over 24 months: £20.08 a month
O2O2
Uses O2 network
12-month contract
£21.00/mo
until 31 March 2027
- Then £23.50 a month from 1 April 2027
- £262.00 total over 12 months
- Average over 12 months: £21.83 a month
O2O2
Uses O2 network
24-month contract
£20.00/mo
until 31 March 2027
- Then £22.50 a month from 1 April 2027 until 31 March 2028
- Then £25.00 a month from 1 April 2028
- £530.00 total over 24 months
- Average over 24 months: £22.08 a month
O2O2
Uses O2 network
24-month contract
£22.00/mo
until 31 March 2027
- Then £24.50 a month from 1 April 2027 until 31 March 2028
- Then £27.00 a month from 1 April 2028
- £578.00 total over 24 months
- Average over 24 months: £24.08 a month
O2O2
Uses O2 network
12-month contract
£24.00/mo
until 31 March 2027
- Then £26.50 a month from 1 April 2027
- £298.00 total over 12 months
- Average over 12 months: £24.83 a month
O2O2
Uses O2 network
monthly rolling
O2O2
Uses O2 network
12-month contract
£28.00/mo
until 31 March 2027
- Then £30.50 a month from 1 April 2027
- £346.00 total over 12 months
- Average over 12 months: £28.83 a month
O2O2
Uses O2 network
monthly rolling
150GB Data5G
Unlimited minutes & texts
O2O2
Uses O2 network
monthly rolling
O2O2
Uses O2 network
12-month contract
£35.00/mo
until 31 March 2027
- Then £37.50 a month from 1 April 2027
- £430.00 total over 12 months
- Average over 12 months: £35.83 a month
O2O2
Uses O2 network
monthly rolling
Show 3 more O2 deals — each beaten on price or data by one above
O2O2
Uses O2 network
24-month contract
£21.00/mo
until 31 March 2027
- Then £23.50 a month from 1 April 2027 until 31 March 2028
- Then £26.00 a month from 1 April 2028
- £554.00 total over 24 months
- Average over 24 months: £23.08 a month
O2O2
Uses O2 network
monthly rolling
O2O2
Uses O2 network
24-month contract
£24.00/mo
until 31 March 2027
- Then £26.50 a month from 1 April 2027 until 31 March 2028
- Then £29.00 a month from 1 April 2028
- £626.00 total over 24 months
- Average over 24 months: £26.08 a month
Cheapest O2 plan is £10.00/mo. O2 runs on O2's network — compare it against every other provider using the same masts.
What you get with O2
The extras and perks included with a O2 plan, beyond the data and minutes.
O2 Priority
Early access to gig and event tickets plus weekly giveaways and offers. Open to O2 and Virgin Media customers.
Details on O2's site →O2 Volt
If you also have Virgin Media broadband, Volt doubles your data at no extra cost.
Details on O2's site →O2 FAQ
How much is O2?
The cheapest O2 SIM-only plan is £10.00/mo (10GB, monthly rolling). O2 sells 17 plans in total, and I check every price against O2's own site daily.
What network does O2 use?
O2 is a main UK network — it owns and runs its own masts and coverage.
Can I use O2 abroad in the EU?
O2 includes EU roaming. Inclusive EU roaming
Does O2 have 5G?
Yes — O2 includes 5G.
Does O2 support eSIM?
Yes — O2 supports eSIM.
Does O2 raise prices mid-contract?
Yes — O2 raises prices during your contract. Prices rise every April - O2 publishes the increases on each plan (e.g. Unlimited Mini £22 becomes £24.50 from the April 2027 bill and £27 from April 2028). The airtime plan rises by £2.50 a year.
Also using the O2 network
You can get the same underlying coverage from giffgaff, Sky Mobile and Tesco Mobile, although prices, speeds, roaming and customer support differ. See the networks on O2 →
Feature and price data is checked by Scrimpr against O2's own site and public documentation. Networks change plans often — always confirm details on the provider's site before buying. Some links are affiliate links (marked *), which support Scrimpr at no cost to you.
