O2 SIM Only Deals

Compare O2 SIM only contracts. Choose from 12 month or 1 month plans and find a data amount that fits you.

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vodafone logo
5GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£18 / month*
Red SIM Only 5GB
More Info
Check Coverage
At Your Postcode
 *Price increases to: £31.80 on 1 April 2026 £33.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service.


  • Maximum speed of 100Mbps
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
50GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£21 / month*
Red SIM Only 50GB
More Info
Check Coverage
At Your Postcode
 *Price increases to: £37.80 on 1 April 2026 £39.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service.


  • 5G Ultra at no extra cost
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
150GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£25 / month*
Red SIM Only 150GB
More Info
Check Coverage
At Your Postcode
 *Price increases to: £47.80 on 1 April 2026 £49.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service.


  • 5G Ultra at no extra cost
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
200GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£28 / month*
Red SIM Only 200GB
More Info
Check Coverage
At Your Postcode
 *Price increases to: £44.80 on 1 April 2026 £46.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service


  • Maximum speed of 100Mbps
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
30GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£28 / month*
Red SIM Only 30GB Xtra Euro Roam
More Info
Check Coverage
At Your Postcode
 *Price increases to: £45.80 on 1 April 2026 £47.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service.


  • 5G Ultra at no extra cost
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
30GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£29 / month*
Red SIM Only 30GB + Entertainment
More Info
Check Coverage
At Your Postcode
 *Price increases to: £52.80 on 1 April 2026 £54.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service.


  • Amazon Prime Video or YouTube Premium (24 months)
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£30 / month*
Unlimited SIM Only Plus
More Info
Check Coverage
At Your Postcode
 *Price increases to: £55.80 on 1 April 2026 £57.60 on 1 April 2027.

Unlimited SIM Only data plans come with a choice between 4G and faster 5G network. Roam for free in 51 destinations worldwide & or 81 destinations with Unlimited Max plan.


  • eSIM Compatible
  • Flexible Upgrade
  • Wi-Fi Calling
  • Maximum speed of 100Mbps
  • VeryMe Rewards app
vodafone logo
30GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£31 / month*
Red SIM Only 30GB Xtra Global Roam
More Info
Check Coverage
At Your Postcode
 *Price increases to: £34.80 on 1 April 2026 £36.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service.


  • 5G Ultra at no extra cost
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£33 / month*
Unlimited SIM Only Plus
More Info
Check Coverage
At Your Postcode
 *Price increases to: £44.80 on 1 April 2026 £46.60 on 1 April 2027.

Unlimited SIM Only data plans come with a choice between 4G and faster 5G network. Roam for free in 51 destinations worldwide & or 81 destinations with Unlimited Max plan.


  • eSIM Compatible
  • Maximum speed of 100Mbps
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£36 / month*
Unlimited Max SIM Only
More Info
Check Coverage
At Your Postcode
 *Price increases to: £41.80 on 1 April 2026 £43.60 on 1 April 2027.

Unlimited Max SIM Only data tariffs come with the fastest speeds available on Vodafone's 5G network, as well as free roaming in 81 destinations.


  • 6-month Half Price Discount
  • eSIM Compatible
  • Wi-Fi Calling
  • 5G-ready
  • VeryMe Rewards app
vodafone logo
200GB SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£36 / month*
Red SIM Only 200GB + Entertainment
More Info
Check Coverage
At Your Postcode
 *Price increases to: £42.80 on 1 April 2026 £44.60 on 1 April 2027.

Vodafone's Red 4G/5G Sim Only plans come with unlimited calls and texts across the board, along with exclusive entertainment and sports packages. Red plans come with generous data allowances, and those on phone plans also benefit from Vodafone's 5 Star Care service


  • Maximum speed of 100Mbps
  • eSIM Compatible
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£40 / month*
Unlimited SIM Only Plus Xtra Euro Roam
More Info
Check Coverage
At Your Postcode
 *Price increases to: £29.80 on 1 April 2026 £31.60 on 1 April 2027.

Unlimited SIM Only data plans come with a choice between 4G and faster 5G network. Roam for free in 51 destinations worldwide & or 81 destinations with Unlimited Max plan.


  • eSIM Compatible
  • Maximum speed of 100Mbps
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£41 / month*
Unlimited SIM Only Plus + Entertainment
More Info
Check Coverage
At Your Postcode
 *Price increases to: £37.80 on 1 April 2026 £39.60 on 1 April 2027.

Unlimited SIM Only data plans come with a choice between 4G and faster 5G network. Roam for free in 51 destinations worldwide & or 81 destinations with Unlimited Max plan.


  • eSIM Compatible
  • Maximum speed of 100Mbps
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£43 / month*
Unlimited Max SIM Only Xtra Euro Roam
More Info
Check Coverage
At Your Postcode
 *Price increases to: £26.80 on 1 April 2026 £28.60 on 1 April 2027.

Unlimited Max SIM Only data tariffs come with the fastest speeds available on Vodafone's 5G network, as well as free roaming in 81 destinations.


  • 6-month Half Price Discount
  • eSIM Compatible
  • 5G Ultra at no extra cost
  • Wi-Fi Calling
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£43 / month*
Unlimited SIM Only Plus Xtra Global Roam
More Info
Check Coverage
At Your Postcode
 *Price increases to: £22.80 on 1 April 2026 £24.60 on 1 April 2027.

Unlimited SIM Only data plans come with a choice between 4G and faster 5G network. Roam for free in 51 destinations worldwide & or 81 destinations with Unlimited Max plan.


  • eSIM Compatible
  • Maximum speed of 100Mbps
  • Wi-Fi Calling
  • Flexible Upgrade
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£44 / month*
Unlimited Max SIM Only with Entertainment
More Info
Check Coverage
At Your Postcode
 *Price increases to: £32.80 on 1 April 2026 £34.60 on 1 April 2027.

Unlimited Max SIM Only data tariffs come with the fastest speeds available on Vodafone's 5G network, as well as free roaming in 81 destinations.


  • 6-month Half Price Discount
  • eSIM Compatible
  • Amazon Prime Video or YouTube Premium (24 months)
  • Wi-Fi Calling
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£46 / month*
Unlimited Max SIM Only Xtra Global Roam
More Info
Check Coverage
At Your Postcode
 *Price increases to: £29.80 on 1 April 2026 £31.60 on 1 April 2027.

Unlimited Max SIM Only data tariffs come with the fastest speeds available on Vodafone's 5G network, as well as free roaming in 81 destinations.


  • 6-month Half Price Discount
  • eSIM Compatible
  • 5G Ultra at no extra cost
  • Wi-Fi Calling
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£51 / month*
Unlimited Max SIM Only Xtra Euro Roam + Entertainment
More Info
Check Coverage
At Your Postcode
 *Price increases to: £19.80 on 1 April 2026 £21.60 on 1 April 2027.

Unlimited Max SIM Only data tariffs come with the fastest speeds available on Vodafone's 5G network, as well as free roaming in 81 destinations.


  • 6-month Half Price Discount
  • eSIM Compatible
  • Amazon Prime Video or YouTube Premium (24 months)
  • Wi-Fi Calling
  • VeryMe Rewards app
vodafone logo
Unlimited SIM Deal
24 Month Contract
Unlimited Minutes
Unlimited Texts
£54 / month*
Unlimited Max SIM Only Xtra Global Roam + Entertainment
More Info
Check Coverage
At Your Postcode
 *Price increases to: £30.80 on 1 April 2026 £32.60 on 1 April 2027.

Unlimited Max SIM Only data tariffs come with the fastest speeds available on Vodafone's 5G network, as well as free roaming in 81 destinations.


  • 6-month Half Price Discount
  • eSIM Compatible
  • Amazon Prime Video or YouTube Premium (24 months)
  • Wi-Fi Calling
  • VeryMe Rewards app

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Why go with O2 SIM only?

O2 are one of the UK's most popular network for SIM Only. A SIM Only contract with O2 gets you the same fantastic perks as a regular phone contract such as O2 Priority and discount offers. O2 have 97% 4G coverage across the UK so you're likely to have great service with your SIM plan.

If you want to join O2 you may pay slightly higher for your contract than with other networks but if you're after good quality coverage, customer service and huge perks then they might be the network for you..

Benefits and Features

  • O2 Priority - Exclusive tickets, offers and experiences. O2 customers get a free coffee on Tuesdays and can get discounts at tons of restaurants around the UK.
  • Great customer service - With the O2 "Gurus", you can get help with your device and any other tech from O2 either in store, online or over the phone.
  • My O2 - Take control of your account 24/7 with the My O2 App. Purchase bolt-ons, make payments and manage your upgrades when it suits youPriority bag drop, Hassle-free security, Priority boarding, Fast bag delivery. (Pay Monthly Customers Only)

Awards & Ratings

Best Network Coverage 2018 - Uswitch mobile awards


Ofcom Overall Satisfaction Scores:
Satisfaction with overall service - 92%
Satisfaction with reception or signal strength - 91%

Average Price per GB Data

Calculated by taking the price per GB for each plan then taking the average - updated 27/12/2018


12 Month Contracts - £2.12
1 Month Contracts - £7.95

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