O2 offers unlimited data SIM cards from £33/month with inclusive hotspot, international roaming and 6 months of free Disney+.

In the UK, O2 currently offers unlimited data on their SIM cards and handsets, with prices starting from £33/month. You’ll get tethering and personal hotspot included on your plan, along with 6 months of free entertainment on Disney+. You’ll also get access to O2’s 5G mobile network and to international roaming in 75 destinations at no extra cost.

In this article, we’ll review unlimited data on O2, including the price plans currently available and the benefits of choosing unlimited data on O2. We’ll then compare O2’s unlimited data plans to rival mobile networks before looking at the coverage you can expect and how to keep your current phone number.

O2 Unlimited Data Plans

Limitless Price Plans

O2 currently offers a range of unlimited data plans in the UK, with prices starting from £33/month. This gets you a SIM card with unlimited UK minutes, texts and mobile data (sometimes also described as Limitless data on O2).

On O2’s unlimited data SIM cards, you’ll also get access to exclusive offers through the O2 Priority app along with 6 months of free entertainment on Disney+. There’s also access to 5G coverage at no extra cost, inclusive roaming in 75 destinations and the ability to share your data allowance with other devices through tethering or personal hotspot.

The following table shows a list of O2’s unlimited data SIM cards:

NetworkMinutesTextsDataMonthly
Cost
O2UnlimitedUnlimitedUnlimited£33.00
18 months
O2UnlimitedUnlimitedUnlimited£35.00
12 months

You can also get unlimited data on a range of handsets from manufacturers such as Apple, Samsung, Huawei and Sony.

See O2 Unlimited Data Deals →

Unfortunately, unlimited data isn’t currently available to customers on O2 Pay As You Go. On Pay As You Go, you can currently choose a data allowance up to 100GB per month.

Disney+ and O2 Extras

If you’re joining O2 on their unlimited data plan, you’ll have access to free O2 Extras like Disney+ or Amazon Prime Video.

The most popular O2 Extra is currently the 6 months of free Disney+. This allows you to watch on-demand entertainment from Disney, Pixar, Marvel, Star Wars, National Geographic and more on up to 10 different devices (up to four devices at the same time). After the first 6 months, you’ll pay £5.99/month if you’d like to continue your Disney+ subscription.

As an alternative to Disney+, a range of other Extras are also available. These include a 6-month subscription to Amazon Music, Amazon Prime Video, Audible, Cafeyn, MelodyVR, McAfee Mobile Security Plus, Calm or O2’s International Bolt On.

For more information, see our in-depth guide on how to use O2 Extras.

Download Speeds

It’s possible to get 5G at no extra cost on O2’s unlimited data SIM card should you have a 5G-ready phone. To qualify, you’ll need to say that you have a 5G-ready device when ordering your unlimited data SIM card from O2’s website. They’ll send you a 5G-ready SIM which you’re able to use on O2’s 5G network.

If you don’t have a 5G-ready phone, you’ll be sent a unlimited data SIM card to use on O2’s 4G network.

On O2’s 5G mobile network, you can access average download speeds of around 150Mbps. This is about six times faster than the average speed of O2’s 4G mobile network which is around 25Mbps.

Fair Usage Limits

Before signing up for an unlimited data plan on O2, it’s worth familiarising yourself with O2’s unlimited data fair usage policy.

There are five main restrictions worth knowing about on O2’s unlimited data plan:

  1. There’s a 650GB monthly fair usage limit. Although O2 says you’ll get “limitless data”, there’s a fair usage policy applying to how much data you can use. This is currently set to 650GB per month. O2 says that if your monthly data usage exceeds 650GB twice in any six-month period, they reserve the right to “investigate your usage further” and to “transfer you to a more suitable plan”.
  2. You can only tether to a maximum of 12 devices. Using tethering or personal hotspot on more than 12 devices is not permitted by O2’s terms and conditions for unlimited data.
  3. Unlimited data is for your “private use only”. O2’s terms and conditions do not allow usage of unlimited data for “commercial or illegal purposes”.
  4. Your unlimited data SIM card cannot be used in a mains-powered device. O2’s terms and conditions state that “Unlimited UK Data sold on handset or SIMO contracts must only be used in mobile devices that do not require to be plugged in order to work”. This is designed to prevent you from using the SIM card inside a 4G or 5G home broadband router.
  5. Up to 20GB of data can be used when you’re travelling abroad. There’s a 20GB per month fair usage limit when you’re travelling abroad to other countries and roaming on your O2 UK SIM card. In Europe, you’ll be surcharged at 0.4p/MB once you exceed this limit. Higher surcharges will apply if you’re travelling outside of Europe.

In addition to the above, O2’s unlimited data plans cannot be used in combination with any shared tariff or Sharer plan from O2. For more information on how the fair usage limit compares to other mobile networks, please see our full guide to unlimited data plans in the UK.

Comparison to Alternatives

Besides O2, there are numerous other mobile networks also offering an unlimited data plan in the UK.

With prices starting at £33/month, O2’s unlimited data plan is actually fairly expensive compared to some other mobile networks.

On other networks, you can currently get unlimited data for as little as £18/month. However, the additional benefits of O2’s unlimited data plan such as access to 5G at no extra cost, access to the O2 Priority app and 6 months of free Disney+ may help to justify the extra money you’re paying.

The following table shows a side-by-side comparison of O2’s unlimited data plan versus those available on other mobile networks:

NetworkMinutesTextsDataMonthly
Cost
ThreeUnlimitedUnlimitedUnlimited£18.00
12 months
iD MobileUnlimitedUnlimitedUnlimited£18.00
1 month
SmartyUnlimitedUnlimitedUnlimited£20.00
1 month
ThreeUnlimitedUnlimitedUnlimited£22.00
24 months
VodafoneUnlimitedUnlimitedUnlimited
2Mbps max
£22.00
24 months
ThreeUnlimitedUnlimitedUnlimited£24.00
1 month
VodafoneUnlimitedUnlimitedUnlimited
2Mbps max
£24.00
12 months
giffgaffUnlimitedUnlimitedAlways-On£25.00
1 month
ThreeUnlimitedUnlimitedUnlimited£26.00
1 month
ThreeUnlimitedUnlimitedUnlimited£26.00
12 months
VodafoneUnlimitedUnlimitedUnlimited
10Mbps max
£26.00
24 months
Virgin MobileUnlimitedUnlimitedUnlimited£27.00
24 months
VodafoneUnlimitedUnlimitedUnlimited
10Mbps max
£28.00
12 months
Virgin MobileUnlimitedUnlimitedUnlimited£30.00
12 months
VodafoneUnlimitedUnlimitedUnlimited£30.00
24 months
VodafoneUnlimitedUnlimitedUnlimited
2Mbps max
£32.00
1 month
VodafoneUnlimitedUnlimitedUnlimited£33.00
12 months
O2UnlimitedUnlimitedUnlimited£33.00
18 months
O2UnlimitedUnlimitedUnlimited£35.00
12 months
VOXIUnlimitedUnlimitedUnlimited£35.00
1 month
Lebara MobileUnlimitedUnlimitedUnlimited£35.00
1 month
VodafoneUnlimitedUnlimitedUnlimited
10Mbps max
£36.00
1 month
EEUnlimitedUnlimitedUnlimited£37.00
24 months
VodafoneUnlimitedUnlimitedUnlimited£41.00
1 month
To show you the most relevant plans, 14 similar but more expensive plans have been hidden. .

When comparing different unlimited data plans, it’s important to be aware of the features and limitations on each one. For instance, EE offers unlimited data from £37/month with a larger fair usage limit of 1,000GB per month. Meanwhile, giffgaff has unlimited data with coverage from O2, but a speed restriction applies after the first 80GB per month on their Always-On data plan. On Vodafone, you’ll have a choice of different download speeds on their unlimited data plans (2Mbps on Unlimited Lite, 10Mbps on Unlimited and uncapped speeds on Unlimited Max).

For a more in-depth comparison, see our full guide to unlimited data plans in the UK.

Network & Coverage

2G, 3G & 4G Coverage

O2 offers 99% population coverage on their 2G, 3G and 4G networks in the UK. Before signing up to their unlimited data plan, it’s worth double-checking to make sure you can get it where you live.

To find out what the coverage from O2 is like where you live, enter your postcode on O2’s online coverage map:

Check O2 Coverage (o2.co.uk) →

Customers with a compatible smartphone can also access 4G Calling and Wi-Fi Calling on O2’s unlimited data plan.

For more information, see our full guide to O2’s network and coverage.

5G Coverage

If you have a 5G-ready phone, you can access 5G at no extra cost on O2’s unlimited data plans. This gives you access to 5G download speeds which are around six times faster than download speeds on 4G. You’ll also benefit from greater network capacity and lower amounts of latency.

You can get 5G coverage from O2 in the following UK towns and cities:

Now Live73 towns and cities are live on O2 5G (September 2020)
Aberdeen, Ashford, Banstead, Basildon, Belfast, Birmingham, Blaydon, Bradford, Bridge of Don, Brighton, Bristol, Cardiff, Chatham, Chesterfield, Chipstead, Coventry, Dartford, Derby, Dewsbury, Dundee, Dyce, Eastbourne, Edinburgh, Esher, Gateshead, Gillingham, Glasgow, Grays, Hemel Hempstead, Huddersfield, Hull, Jarrow, Leeds, Leicester, Lincoln, Lisburn, Liverpool, London, Lowestoft, Luton, Manchester, Mansfield, Middlesbrough, Morley, Newcastle, Newtownabbey, North Shields, Northampton, Norwich, Nottingham, Orpington, Oxford, Peterborough, Plymouth, Rainham, Redhill, Rotherham, Royal Tunbridge Wells, Sheffield, Slough, South Shields, Staines-upon-Thames, Stoke-on-Trent, Sunbury, Sunderland, Thundersley, Tynemouth, Warrington, Washington, Weybridge, Windsor, Worthing, York
Planned &
Announced
14 towns and cities planned
Birkenhead, Cambridge, Hove, Kingston-upon-Thames, Milton Keynes, Newbury, Portsmouth, Southampton, Wolverhampton (Summer 2020)
Blackpool, Bournemouth, Eton, Guildford, Reading (January 2020)

For more information, see our full guide to the 5G rollout in the UK. Alternatively, see O2’s official website about their 5G service.

Tethering & Personal Hotspot

Tethering or personal hotspot refers to the process of sharing your smartphone’s data connection with another device (e.g. with your laptop or tablet).

On O2’s unlimited data plans, tethering and personal hotspot usage is permitted. However, there’s a restriction within the terms and conditions that say you can only use tethering and personal hotspot on up to 12 devices. This is stated in clause 3.5 of their terms and conditions:

3.5. Usage of Unlimited Data is subject to our Fair Usage Policy. To help us identify whether you are using your Unlimited Data in accordance with the Fair Usage Policy and these Terms , we may monitor the amount of data you are using. Where you regularly tether to 12 or more devices, have used 650GB of data twice within a 6 month period, or have connected to a device other than an eligible device as stipulated in clause 3.3 of these Terms, then we may investigate your usage further to ascertain whether your Unlimited Data usage is for the permitted use. Where following such investigation we determine or reasonably suspect that your usage is for purposes other than the permitted use then we reserve the right to transfer you to a more suitable plan.

On most other unlimited data plans from other mobile networks, there is no restriction on how many devices you’re able to use tethering or personal hotspot on (EE is the only other network with a similar restriction on tethering). For this reason, it might be worth choosing another network if you’re likely to tether on more than 12 devices.

International Roaming

On O2’s unlimited data plans, it’s possible to use up to 20GB of data abroad each month.

You’ll get the O2 Travel Inclusive Zone Bolt-On included when you purchase an unlimited data plan from O2. This covers international roaming in 48 European destinations, along with an additional 27 destinations outside of Europe (including the USA, Canada, Mexico, Australia and New Zealand).

Within Europe, you’ll be surcharged 0.4p/MB if you exceed the 20GB roaming data limit. Outside of Europe, the surcharge may be higher. Your usage of calling and texting is also limited to 120 minutes and 120 texts per day when travelling outside Europe.

For more information, see O2’s international roaming web page or our in-depth guide to O2 Travel.

Keeping Your Phone Number

If you’re moving from another mobile network to O2 to take advantage of their unlimited data plans, it’s a straightforward process to keep your existing phone number.

To do so, start by getting a PAC Code from your current mobile network. You can get one through your mobile network’s website or app, or by texting PAC to 65075. A PAC Code will be sent to you free of charge within 60 seconds of your request.

Once you have the PAC Code from your old network, order your new phone or SIM card with unlimited data on O2. When your new phone or SIM card arrives, you can provide the PAC Code to O2 through this online form. Your phone number transfer will then be scheduled, normally for the next working day.

For a step-by-step guide on moving your phone number to O2, please select your current mobile network from the drop down menu below:

PAC Code Finder: Transfer Your Phone Number to O2

Select your current mobile network:

  More Options

Frequently Asked Questions

How much do unlimited data plans cost on O2?
You can get unlimited data on an O2 SIM card from £33/month. This also comes with unlimited UK minutes, unlimited UK texts, inclusive personal hotspot and roaming in 75 destinations. You’ll also get access to the O2 Priority app and 6 months of free Disney+ (or another O2 Extra such as Amazon Music or Amazon Prime Video). A range of handsets are also available with unlimited data on O2.
Can I use tethering or personal hotspot on O2’s unlimited data plans?
Yes. It’s possible to use the tethering or personal hotspot feature on your phone with an O2 unlimited data SIM card inside your phone. However, O2’s terms and conditions limit this to a maximum of 12 devices.
Is there a fair usage limit for unlimited data on O2?
The fair usage limit on O2’s unlimited data SIM card is 650GB per month. If you use more than 650GB of data twice in a six-month period, O2 says they reserve the right to “investigate your usage further” and to “transfer you to a more suitable plan”.
How does O2’s unlimited data plan compare to other networks?
On O2, you can currently get an unlimited data SIM card from £33/month. On other mobile networks, unlimited data is available from just £18/month. However, some of the additional features available on O2 may make it worthwhile choosing the more expensive option. For instance, you’ll get access to 5G at no extra cost, access to the O2 Priority app and 6 months of free Disney+ on O2. You’ll also get the O2 Travel Inclusive Zone Add-On with inclusive roaming in 75 destinations.
What download speeds will I get?
You can access 5G download speeds on O2’s unlimited data plan, averaging 150Mbps on a 5G-ready phone. If you’re using a 4G phone or are in an area with 4G coverage, average download speeds are normally in the region of 25Mbps.
What coverage will I get on O2’s unlimited data plan?
You’ll get access to 99% population coverage on O2’s 2G, 3G and 4G networks in the UK. In addition, customers with a 5G-ready smartphone can access O2’s 5G network in over 60 UK towns and cities. You can use O2’s online coverage map to check the coverage available in your area.
Can I use my unlimited data allowance when travelling abroad?
Yes. It’s possible to use up to 20GB of your data abroad when travelling to one of 48 European destinations. In addition, you’ll get unlimited data for use in 27 destinations outside Europe, although download speeds might be throttled when you use more than 150MB per day (or when you use more than 50MB of data on streaming in one day).
Can I keep my current phone number?
Yes. It’s easy to keep your phone number when moving to O2. Simply ask your current mobile network to provide you with a PAC Code. You can get one from your mobile network’s website or app, or by texting PAC to 65075. This should be given to O2 once you’ve signed up to their network.

More Information

For more information, please see O2’s official website. You can also see their full range of handsets and SIM cards with unlimited data.

Your Comments 6 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 6 comments from readers. You can add your own comment here.

  • Shelley Bourne said:

    Hi

    Can I use a 02 unlimited data sim in a 4g mobile router (sim slot) for use in our static caravan?

    We only have a choice of 02 or vodaphone for coverage and neither myself or my husbands current pay monthly contracts are with these providers, so we have ended up having 2 separate pay as you go sims as well. Calls aren’t an issue but data is, so we thought the mobile router maybe the way to go but are unclear if it’s acceptable to use these sims in a router. Any advice greatly received.

    • Hi Shelley,
      Thanks for your comment. Since 2018, it has been possible to use a smartphone SIM card in any device, including a 4G-powered router. You can, therefore, use an O2 unlimited data SIM card in a 4G home broadband router. The caveat to this is their fair usage policy: you only get 650GB of data per month and the use of tethering/personal hotspot is limited to only 12 devices. This fair usage policy may make it impractical for you to use it in a home broadband router, so I’d personally recommend going for a Vodafone unlimited data plan instead.
      Hope this helps,
      Ken

      • Shelley Bourne replied:

        Thank you so much for your detailed response it is much appreciated. It’s so nice to be able to ask a tech question and not feel silly.

        Thank you decision made on provider.

        Thank you again

        • Hi Shelley,
          No worries – I’m really glad to be able to help out. And it’s certainly not a silly question – lots of other people have asked me the exact same thing 🙂
          Ken

          • Hi Ken I am getting told by a sales agent at o2 that I can’t put a mobile SIM in a router. I am being offered router-specific deals that don’t include a limitless data allowance, unlike phone deals.

            I want to put an unlimited mobile SIM into my router but I am worried it won’t work…

            Any advice?

          • Hi David,
            Thanks for your comment. O2’s terms and conditions prohibit the usage of their unlimited data SIM cards in a mains-powered device (e.g. in a mains-powered 4G router). More info here. There’s still a little bit of debate over whether this restriction is actually legal (as Ofcom’s net neutrality ruling said they shouldn’t discriminate based on device) but I don’t believe this has yet been challenged.
            Ken

Leave a Reply