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NetworkTalk Time
Minutes
Text
Message
Mobile
Internet
Contract
Length
Extra
Information
Monthly
Cost
 
O2 SIM-Only100
Minutes
Unlimited Texts100MB Data
3G Internet
12 Months Contract100 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£8.00
Per Month
Best Buy
Order Now
O2 SIM-Only300
Minutes
Unlimited Texts750MB Data
3G Internet
30 Day Rolling Contract100 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£11.00
Per Month
Order Now
O2 SIM-Only50
Minutes
Unlimited Texts100MB Data
3G Internet
30 Day Rolling Contract100 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£11.00
Per Month
Order Now
O2 SIM-Only600
Minutes
Unlimited Texts750MB Data
3G Internet
12 Months Contract500 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£16.00
Per Month
Order Now
O2 SIM-Only100
Minutes
Unlimited Texts250MB Data
3G Internet
30 Day Rolling Contract500 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£16.00
Per Month
Order Now
O2 Business SIM-OnlyUnlimited MinutesUnlimited Texts1GB Data
3G Internet
12 Months ContractOptional add-on package at checkout for international calls.
Was £21.67, NOW £17.20.
Suitable for businesses only.
£17.20
Per Month
Order Now
O2 SIM-Only300
Minutes
Unlimited Texts500MB Data
3G Internet
30 Day Rolling Contract500 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£21.00
Per Month
Order Now
O2 SIM-OnlyUnlimited MinutesUnlimited Texts1GB Data
3G Internet
12 Months ContractBest for heavy iPhone, BlackBerry & Smartphone data users.£21.00
Per Month
Order Now
O2 SIM-OnlyUnlimited
Minutes
Unlimited Texts1GB Data
3G Internet
12 Months ContractBest for light iPhone, BlackBerry & Smartphone data users.£21.00
Per Month
Best Buy
Order Now
O2 Business SIM-OnlyUnlimited MinutesUnlimited Texts1GB Data
4G Internet
12 Months ContractOptional add-on package at checkout for international calls.
Your BlackBerry, iPhone or Smartphone must be 4G ready.
For businesses only.
£21.67
Per Month
Order Now
O2 SIM-OnlyUnlimited MinutesUnlimited Texts2GB Data
3G Internet
12 Months ContractBest for heavy iPhone, BlackBerry & Smartphone data users.£24.00
Per Month
Order Now
O2 Business SIM-OnlyUnlimited MinutesUnlimited Texts5GB Data
4G Internet
12 Months ContractOptional add-on package at checkout for international calls.
Includes a promotional 2GB of data.
Your BlackBerry, iPhone or Smartphone must be 4G ready.
Suitable for businesses only.
£25.84
Per Month
Order Now
O2 4G SIM-OnlyUnlimited MinutesUnlimited Texts1GB Data
4G Internet
12 Months ContractYour BlackBerry, iPhone or Smartphone must be 4G ready.£26.00
Per Month
Order Now
O2 SIM-Only600
Minutes
Unlimited Texts750MB Data
3G Internet
30 Day Rolling Contract500 Minutes O2 to O2.
Best for light iPhone, BlackBerry & Smartphone data users.
£26.00
Per Month
Order Now
O2 Business SIM-OnlyUnlimited MinutesUnlimited Texts8GB Data
4G Internet
12 Months ContractOptional add-on package at checkout for international calls.
Includes a promotional 3GB of data.
Your BlackBerry, iPhone or Smartphone must be 4G ready.
Suitable for businesses only.
£30.00
Per Month
Order Now
O2 4G SIM-OnlyUnlimited MinutesUnlimited Texts5GB Data
4G Internet
12 Months ContractYour BlackBerry, iPhone or Smartphone must be 4G ready.£31.00
Per Month
Order Now
O2 SIM-OnlyUnlimited MinutesUnlimited Texts1GB Data
3G Internet
30 Day Rolling ContractBest for heavy iPhone, BlackBerry & Smartphone data users.£31.00
Per Month
Order Now
O2 4G SIM-OnlyUnlimited MinutesUnlimited Texts5GB Data
4G Internet
12 Months ContractYour BlackBerry, iPhone or Smartphone must be 4G ready.£31.00
Per Month
Best Buy
Order Now
O2 SIM-OnlyUnlimited MinutesUnlimited Texts500MB Data
3G Internet
30 Day Rolling ContractBest for heavy iPhone, BlackBerry & Smartphone data users.£32.00
Per Month
Order Now
O2 4G SIM-OnlyUnlimited MinutesUnlimited Texts8GB Data
4G Internet
12 Months ContractYour BlackBerry, iPhone or Smartphone must be 4G ready.£36.00
Per Month
Order Now
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  • Key Benefits
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Best SIM Only

Hand picked selection of the best SIM contracts by our editors from all of the UK’s major mobile networks.

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Cheap SIM Only

Cheap SIM contracts from all UK mobile service operators. Deals listed are below £15.00 per month.

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iPhone SIM Only

All price plans listed here are suitable for Apple iPhone owners. Choose your SIM card size at checkout.

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O2 SIM-Only Contract

Introducing O2 SIM Deals

O2 SIM-Only phone deals offer you the chance to connect to a mobile network, yet still give you the freedom to choose whatever phone or other mobile device you want to use – maybe you are perfectly content with your existing phone, for example, or want to choose a new one completely independently of your preferred operator.

With an O2 SIM-Only mobile contract, in other words, you are buying just the ability to connect to the network via the SIM card – or Subscriber Identification Module – that gives you access to all of O2’s mobile services. This may also provide the ideal solution if you are looking to change network provider or, even if you are already an O2 customer, to switch to a new plan that better suits your needs. You are able to choose from O2 Simplicity SIM-Only mobile phone contract deals that involve:

  • A12-month contract – if you are able to commit to an annual arrangement and get a somewhat cheaper deal in return.
  • A1-month contract – if you are uncertain whether a particular plan suits your needs, if you are going to be leaving the country soon and will no longer need a mobile phone, or if you have children about to “learn the ropes” with their first mobile phone.
  • Pay As You Go (PAYG) – if you are an occasional user or simply uncertain just what your needs may be from one day to the next.

SIM Selection Benefits of O2 Simplicity SIM Contracts

One of the key benefits of any O2 pay-monthly SIM-Only deal is that – whatever your chosen plan – you are allowed an unlimited number of texts.

This generous allowance of text messages is available on even the cheapest 12-month contract, so that you get not only unlimited texts but also 100 call minutes (to any mobile or landline number in the UK, plus an additional 100 minutes via O2 to O2 numbers) and up to 100MB of data usage, all for just £8 a month.

O2’s PAYG SIM-Only deal – which is called Pay & Go Go Go – also offers cheap access to the mobile network, where a basic monthly £10 top-up will give you 75 minutes of calls, 500 texts and up to 250MB of data usage. Through additional top-ups, however, you can also access such features as more O2 to O2 calls, unlimited texts, international calls, and special deals for your Blackberry and iPad.

O2 Package

O2 is owned by the Spanish telecommunications giant Telefónica and second only to EE offers the country’s largest mobile network. The name is instantly recognisable, thanks in no small part to the company’s sponsorship of the O2 Arena in London.

When it started out in 1985, the company was known as Cellnet, a joint partnership between the BT Group and Securicor. In 1999, BT bought out Securicor’s stake in the network and it became known as BT Cellnet. The name O2 first appeared in 2002 when BT sold off this wing of its company to a newly-formed mmO2 plc, which traded under the name O2.

O2 was bought by Telefónica in 2005 but continued to trade under its own name.

In June 2012 O2 concluded a deal with Vodafone, allowing the two network providers to share their respective technologies across a transmitter network thus totalling some 18,500 sites.

O2 won a licence from the industry regulator, OFCOM, in February 2013 for the development of a 4G network. This has now been launched, with the aim of providing coverage in 13 British cities by the end of that same year.