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Compare O2 SIM only deals

Compare the latest O2 Simplicity SIM only deals and tariffs including pay monthly and Pay & Go plans. Our comparison includes prices, contracts, minutes, data, texts and more.

Provider O2 Mobile
Data usage Unlimited
Minutes Unlimited
Texts Unlimited
Our rating 4/5
Prices from £10 per month

Compare O2 SIM only deals

PlanDataMinutesTextsContract LengthCost
O2 SIM Only2GB1000Unlimited18 months£10
O2 SIM Only1GB1000Unlimited12 months£11
O2 SIM Only3GBUnlimitedUnlimited12 months£13
O2 SIM Only9GBUnlimitedUnlimited12 months£16
O2 SIM Only15GBUnlimitedUnlimited18 months£18
O2 SIM Only12GBUnlimitedUnlimited12 months£18
O2 SIM Only25GBUnlimitedUnlimited12 months£20
O2 SIM Only40GBUnlimitedUnlimited18 months£22
O2 SIM Only15GBUnlimitedUnlimited12 months£23
O2 SIM Only100GBUnlimitedUnlimited18 months£25
O2 SIM Only50GBUnlimitedUnlimited12 months£25
O2 SIM OnlyUnlimitedUnlimitedUnlimited18 months£33
O2 SIM OnlyUnlimitedUnlimitedUnlimited12 months£35
O2 SIM Only40GBUnlimitedUnlimited12 months£38
14 results found
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  • Tariffs & pricing

    At least 50 minutes,  At least 50 texts,  Any data per month data,  Any contract length contract,  Any cost per month monthly cost
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NetworkMinimum
Contract
Inclusive
Minutes
Inclusive
Texts
Download
Data
Monthly
Cost
O2 SIM Only
    O2
    2GB
    inclusive
    data
    1000
    inclusive
    minutes
    Unlimited
    inclusive
    texts
    18
    month
    contract
    £10.00
    per month
    See Deal
    O2 SIM Only
      O2
      1GB
      inclusive
      data
      1000
      inclusive
      minutes
      Unlimited
      inclusive
      texts
      12
      month
      contract
      £11.00
      per month
      See Deal
      O2 SIM Only
        O2
        3GB
        inclusive
        data
        Unlimited
        inclusive
        minutes
        Unlimited
        inclusive
        texts
        12
        month
        contract
        £13.00
        per month
        See Deal
        O2 SIM Only
          O2
          9GB
          inclusive
          data
          Unlimited
          inclusive
          minutes
          Unlimited
          inclusive
          texts
          12
          month
          contract
          £16.00
          per month
          See Deal
          O2 SIM Only
            O2
            15GB
            inclusive
            data
            Unlimited
            inclusive
            minutes
            Unlimited
            inclusive
            texts
            18
            month
            contract
            £18.00
            per month
            See Deal
            O2 SIM Only
              O2
              12GB
              inclusive
              data
              Unlimited
              inclusive
              minutes
              Unlimited
              inclusive
              texts
              12
              month
              contract
              £18.00
              per month
              See Deal
              O2 SIM Only
                O2
                25GB
                inclusive
                data
                Unlimited
                inclusive
                minutes
                Unlimited
                inclusive
                texts
                12
                month
                contract
                £20.00
                per month
                See Deal
                O2 SIM Only
                  O2
                  40GB
                  inclusive
                  data
                  Unlimited
                  inclusive
                  minutes
                  Unlimited
                  inclusive
                  texts
                  18
                  month
                  contract
                  £22.00
                  per month
                  See Deal
                  O2 SIM Only
                    O2
                    15GB
                    inclusive
                    data
                    Unlimited
                    inclusive
                    minutes
                    Unlimited
                    inclusive
                    texts
                    12
                    month
                    contract
                    £23.00
                    per month
                    See Deal
                    O2 SIM Only
                      O2
                      100GB
                      inclusive
                      data
                      Unlimited
                      inclusive
                      minutes
                      Unlimited
                      inclusive
                      texts
                      18
                      month
                      contract
                      £25.00
                      per month
                      See Deal
                      O2 SIM Only
                        O2
                        50GB
                        inclusive
                        data
                        Unlimited
                        inclusive
                        minutes
                        Unlimited
                        inclusive
                        texts
                        12
                        month
                        contract
                        £25.00
                        per month
                        See Deal
                        O2 SIM Only
                          O2
                          Unlimited
                          inclusive
                          data
                          Unlimited
                          inclusive
                          minutes
                          Unlimited
                          inclusive
                          texts
                          18
                          month
                          contract
                          £33.00
                          per month
                          See Deal
                          O2 SIM Only
                            O2
                            Unlimited
                            inclusive
                            data
                            Unlimited
                            inclusive
                            minutes
                            Unlimited
                            inclusive
                            texts
                            12
                            month
                            contract
                            £35.00
                            per month
                            See Deal
                            O2 SIM Only
                              O2
                              40GB
                              inclusive
                              data
                              Unlimited
                              inclusive
                              minutes
                              Unlimited
                              inclusive
                              texts
                              12
                              month
                              contract
                              £38.00
                              per month
                              See Deal
                              14

                              Compare O2 SIM only deals

                              How do I compare different packages?

                              If you’ve found a handset you’re comfortable with, but are looking for a better deal on your tariff, then a SIM only deal might fit the bill perfectly. O2 has some of the best SIM only deals suitable for every pocket and requirement, including a handful of data-only SIMs for tablets or mobile broadband devices.

                              The blue ‘see deal’ button takes you to O2’s website

                              Our comparison page allows you to compare SIM only deals from O2 and order them according to your preference. If you want a little more information regarding each SIM, you can click on the blue button on the right-hand side of the table that will take you over to O2’s website.

                              Availability

                              If you’re moving from a different provider to O2, it’s best to check what the mobile coverage is like in your area. This can be done on 02’s website which has a map of the provider’s 2G, 3G and 4G coverage. O2’s availability is generally good, and it states that it hopes to have 98 per cent of the UK population covered on its 2G, 3G and 4G networks before 2017, so there’s a good chance you’ll be covered by it.

                              Check the detail

                              Before you dive right into the first SIM you spot, check the detail of the package. Make sure you know what size and type of SIM you want (O2 supply SIMs for iPhones, Blackberrys, other standard smartphones and tablets). Also check the contract length, the monthly price, and whether it’s 4G ready. It’s also worth having a ferret through some of the fine print in the terms and conditions so you understand where you stand if, for example, you needed to end your contract early; it’s best to know this information before committing.

                              Why choose an O2 SIM only deal?

                              Cheaper than a contract that comes with a phone

                              The major benefit of a SIM only deal is that it’s far cheaper than opting for a contract that comes with the price of a handset attached. O2 has a great range of contracts, with a variety of minute and data allowances so you should be able to find one that suits your requirements. They also come with a wide range of prices, so you should be able to make a substantial saving if you’re looking to cut down on your bills. It’s also worth noting that all O2 SIMs come with unlimited texts, so it’s ideal for those who like to chatter away to their friends by text.

                              Contracts are either 30 days or 12 months in length

                              You can choose your level of commitment with O2, as its SIM only mobile phone deals come with either 30-day or 12-month contracts. Opting for the shorter contract is more expensive, but you get the flexibility of being able to leave whenever you want.

                              A choice of either 3G or 4G-ready

                              If your phone is 4G-ready, and you live in an area with a good 4G signal, you’ll automatically be upgraded to the faster service, providing you opt for a 4G-ready SIM. Having 4G (short for 'fourth generation') means you will be able to access content and stream files far faster than on 3G. How fast your 4G connection will be depends on your location and the number of people using the service.

                              Pros & cons

                              Pros

                              • Cheaper than a contract with a phone
                              • 30-day or 12-month contracts
                              • A choice of either 3G or 4G speeds

                              Cons

                              • You need to be happy with your current handset
                              • You will need to get your phone unlocked if switching provider
                              • 4G coverage is not available everywhere

                              Which package is right for me?

                              If you’re still undecided over which O2 SIM only deal is right for you then fear not, we’ve picked out three of our favourites to give you a taste of what you could be experiencing.

                              O2 12-month 250 minutes/250MB SIM

                              This is the cheapest SIM only deal offered by O2 and is great for light users that use their phone mainly for texting but still make the occasional phone call and send the occasional e-mail. It is only available on the 3G network, although you’d soon blow though your 250MB allowance if you were on 4G. Using data outside your contract limits is charged at a maximum of £1 per day, so it’s worth keeping track of how much you’re using as it could soon add up.

                              O2 30-day unlimited minutes/2GB SIM

                              This SIM comes with unlimited texts and minutes and a 2GB data allowance. It comes 4G-ready and, perhaps most attractively, has a 30-day rolling contract. This SIM would be perfect for those that make a lot of calls and use an average amount of data, but do not want to commit to a year-long contract.

                              O2 12-month unlimited minutes/25GB SIM

                              This is the most expensive SIM only deal available from O2, and you get a good amount of bang for your buck. Along with unlimited calls and texts, you get an 25GB data allowance, which should be enough for most internet users. O2 also allows tethering on its network, which can sap data faster, but is great if you only need it in short bursts. This is an ideal SIM for those that use their phone a lot, and aren’t planning on switching contract any time soon.

                              What will I need?

                              A handset

                              Mobile phones evolve and improve year-on-year, but if you’re happy with the particular model you’ve got, then a SIM only plan might be the thing for you. If you bought and used your phone with a different provider, then you’ll need to get it unlocked so it can be used with O2. This isn’t a particularly risky task, although it might invalidate the phone’s warrantee.

                              A contract

                              O2 offers two contracts with its SIM only deals: a 30-day contract for those wanting the flexibility to be able to leave at the drop of a hat and a 12-month contract for those that don’t. The longer contract is cheaper but comes with the added risk of not being able to leave if your circumstances change.

                              How do I switch?

                              Once you’ve chosen your desired SIM, you’ll need to speak to your current provider and tell it that you’re switching. It’s best if this is done outside of your contract period, as you’ll likely incur a cancellation fee if you don’t.

                              A PAC will allow you to keep your number

                              If you want to keep your current mobile number, and you are moving from a different provider to O2, you may need a port authorisation code (PAC). This code needs to go to O2 within 30 days and means you should be able to keep your old number.

                              Six essential questions before you buy

                              1. Can you get O2 coverage in your area?
                              2. Which SIM does your phone take?
                              3. How much am I willing to spend?
                              4. Do I want to get my phone unlocked?
                              5. How long do I want my contract to be?
                              6. Do I need 4G?

                              Cable.co.uk recommends

                              There is a good range of SIMs on offer here and you should be able to find one that fits your needs. Make sure you know what it is you’re getting before you sign a contract, and that you’re clear about unlocking your phone and getting a PAC if you’re switching providers.