O2

Mobile deals from O2

O2 is one of the UK's four main mobile networks, combining solid nationwide coverage with a well regarded rewards programme and a wide ecosystem of partner services. It also supports more MVNOs than any other UK network.

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O2 Unlimited SIM - 24 months

Data
Unlimited
Term
24 months
Per month
£23.99
Price rises by £2.50 every April
★ SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 Unlimited SIM - 24 months

Data
Unlimited
Term
24 months
Per month
£28.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 Unlimited SIM - 24 months

Data
Unlimited
Term
24 months
Per month
£32.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 Unlimited SIM - 12 months

Data
Unlimited
Term
12 months
Per month
£35.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 Unlimited SIM - 1 month

Data
Unlimited
Term
1 month
Per month
£38.00
Price rises by £2.50 every April
SIM Only Mini Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 Unlimited SIM - 12 months

Data
Unlimited
Term
12 months
Per month
£36.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 Unlimited SIM - 12 months

Data
Unlimited
Term
12 months
Per month
£41.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 150 GB SIM - Rolling

Data
150 GB
Term
Rolling
Per month
£30.00
Price rises by £2.50 every April
Rolling Plan Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 24 months

Data
100 GB
Term
24 months
Per month
£19.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 125 GB SIM - Rolling

Data
125 GB
Term
Rolling
Per month
£30.00
Price rises by £2.50 every April
Big Bundle Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 24 months

Data
100 GB
Term
24 months
Per month
£24.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 24 months

Data
100 GB
Term
24 months
Per month
£25.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 12 months

Data
100 GB
Term
12 months
Per month
£28.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 12 months

Data
100 GB
Term
12 months
Per month
£29.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 1 month

Data
100 GB
Term
1 month
Per month
£31.00
Price rises by £2.50 every April
SIM Only Mini Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 100 GB SIM - 12 months

Data
100 GB
Term
12 months
Per month
£34.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 50 GB SIM - Rolling

Data
50 GB
Term
Rolling
Per month
£20.00
Price rises by £2.50 every April
Rolling Plan Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 30 GB SIM - Rolling

Data
30 GB
Term
Rolling
Per month
£15.00
Price rises by £2.50 every April
Rolling Plan Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 40 GB SIM - Rolling

Data
40 GB
Term
Rolling
Per month
£20.00
Price rises by £2.50 every April
Big Bundle Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 50 GB SIM - 24 months

Data
50 GB
Term
24 months
Per month
£24.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 25 GB SIM - Rolling

Data
25 GB
Term
Rolling
Per month
£15.00
Price rises by £2.50 every April
Big Bundle Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 10 GB SIM - Rolling

Data
10 GB
Term
Rolling
Per month
£10.00
Price rises by £2.50 every April
Rolling Plan Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 24 months

Data
20 GB
Term
24 months
Per month
£21.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 24 months

Data
20 GB
Term
24 months
Per month
£22.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 12 months

Data
20 GB
Term
12 months
Per month
£24.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 8 GB SIM - Rolling

Data
8 GB
Term
Rolling
Per month
£10.00
Price rises by £2.50 every April
Big Bundle Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 12 months

Data
20 GB
Term
12 months
Per month
£25.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 1 month

Data
20 GB
Term
1 month
Per month
£27.00
Price rises by £2.50 every April
SIM Only Mini Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 24 months

Data
20 GB
Term
24 months
Per month
£27.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 20 GB SIM - 12 months

Data
20 GB
Term
12 months
Per month
£30.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 24 months

Data
3 GB
Term
24 months
Per month
£18.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 24 months

Data
3 GB
Term
24 months
Per month
£19.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 12 months

Data
3 GB
Term
12 months
Per month
£21.00
Price rises by £2.50 every April
SIM Only Classic Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 12 months

Data
3 GB
Term
12 months
Per month
£22.99
Price rises by £2.50 every April
SIM Only Plus Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 1 month

Data
3 GB
Term
1 month
Per month
£24.00
Price rises by £2.50 every April
SIM Only Mini Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 24 months

Data
3 GB
Term
24 months
Per month
£24.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

O2 3 GB SIM - 12 months

Data
3 GB
Term
12 months
Per month
£27.99
Price rises by £2.50 every April
SIM Only Ultimate Plan 5G Unlimited Calls & Texts
See deal Details
O2

Value

4/5

O2 pricing is slightly higher than budget competitors but offset by perks and flexibility.

Coverage

4/5

O2 has strong coverage in cities and towns, though rural performance can vary.

Connectivity

3.5/5

5G rollout is improving, but speeds can be less consistent than EE or Vodafone.

Perks

5/5

O2 Priority remains one of the strongest perk systems in the UK market.

Tariffs

4.5/5

Flexible plans and refresh options make O2 easy to adapt over time.
Final Rating: 4.2/5

Why choose O2?

O2 is a strong all round choice, particularly if you value customer perks alongside your mobile service. Its Priority programme gives access to early ticket sales, competitions, and partner discounts. Coverage is good across the UK, particularly in urban areas, and O2's 4G network is reliable. 5G rollout is ongoing and competitive. O2 also offers Volt benefits for customers who also have Virgin Media broadband, adding data boosts and roaming perks.

MNO

O2 is a full mobile network operator, part of Virgin Media O2. It hosts a large number of MVNOs including giffgaff, Sky Mobile, Tesco Mobile, and others meaning O2 coverage is accessible at a range of price points. If O2 signal works well in your area but you don't need the Priority perks, an MVNO on O2's network may offer better value.

Roaming overview

O2 offers roaming options including a Travel Inclusive Zone on some plans, which allows use in a list of destinations without daily charges. Outside those destinations, or on plans without travel inclusion, standard roaming charges apply. As with all networks, check your specific plan's roaming terms before travelling the included destinations and fair use limits can change.

Volt benefits

If you have Virgin Media broadband at home and an eligible O2 Pay Monthly plan, Volt can provide additional benefits including data boosts on your mobile plan and extra roaming perks. The exact benefits depend on your broadband and mobile plan combination check the current Volt offer when comparing.

Latest Updates

Priority perks

O2 Priority is one of the more established network rewards programmes in the UK. Through the Priority app, eligible customers get access to presale tickets for concerts and events, prize draws, and partner discounts across food, retail, and entertainment. The value varies depending on how much you use it, but for regular concert goers or people who engage with the partners, it can offset some of the monthly cost.

3G switch off

O2 completed its 3G switch off in 2025. Devices that only support 3G will no longer work for calls or data. Most modern smartphones are unaffected, but if you are using an older or budget handset it is worth checking it supports 4G and VoLTE (4G Calling) before signing up.

A brief history of O2

O2 has a longer history than many people realise. It started out as Cellnet all the way back in 1985, before BT demerged its mobile business as a separate entity in 2002 under the O2 name. In 2006 it became part of Telefónica, and more recently it merged with Virgin Media to form Virgin Media O2.

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We believe Sean works in the call centre just outside Gondor, but so far we haven't got through to him.

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