O2 is offering unlimited data plans from £31/month with six months of Apple Music and Disney+ or Amazon Prime Video. 5G is available at no extra cost.

In the UK, O2 is now offering an unlimited data SIM card for just £31 per month. Available on either a 12-month contract or 24-month contract, it now includes 6 months of Apple Music. You can also choose a free O2 Extra such 6 months of Disney+ or 12 months of Amazon Prime Video.

As a customer on O2’s unlimited data plan, you’ll get access to 5G at no extra cost in 193 UK towns and cities.

In this article, we’ll review O2’s unlimited data plans. We’ll start by looking at the unlimited data SIM cards available from O2 and what you’ll get included in terms of free music and entertainment. We’ll also look at the download speeds available and at O2’s fair usage policy for unlimited data in the UK. Finally, we’ll compare O2’s unlimited data plan to what is available on other networks and how you can keep your current phone number when joining O2.

Prices From: £31 per month
Contract Length: 12 month or 24 month contract
Inclusive Features:
Fair Usage:
  • 650GB monthly fair use limit
  • Maximum of 12 devices on tethering & personal hotspot
  • Personal use only in a battery-powered mobile device

O2 Unlimited Data Plans

In the UK, O2 currently offers unlimited data SIM cards from £31 per month. You’ll get unlimited minutes, unlimited texts and unlimited data on your SIM card along with access to 5G at no extra cost and inclusive roaming in 75 worldwide destinations. You’ll also get the following benefits:

  • 6 months of free Apple Music. You’ll get 6 months of free Apple Music on O2’s unlimited data plans. This will allow you to stream more than 70 million songs on-demand without ads. You can listen on your mobile phone (iPhone or Android) as well as on other devices including your smart speaker, laptop or in your car with CarPlay.
  • 6 months of free Disney+ or 12 months of free Amazon Prime Video. You’ll also get an O2 Extra included with your plan. Popular options included a 6 month subscription to Disney+ (worth £7.99 per month) or a 12 month subscription to Amazon Prime Video (worth £5.99 per month). You can also choose something different such as access to Amazon Music or Audible.
  • Access to O2 Priority for the duration of your plan. You’ll have access to the O2 Priority app for the duration of your plan. This gives you access to exclusive offers, discounts and early-access tickets. You’ll also get freebies like a free hot drink from Caffè Nero each week.

The following table shows O2’s unlimited data plans:

NetworkMinutesTextsDataMonthly Cost
(may rise during contract)
24 months
24 months
12 months
12 months
1 month

Get Unlimited Data on O2 →

Although there are cheaper plans available with unlimited data on other networks, the inclusion of benefits like Apple Music, Disney+ and Prime Video are fairly unique to O2. This means you might save money overall as you can reduce your other services and subscriptions.

You can also get unlimited data on a range of smartphones from O2 including the latest devices from Apple and Samsung.

Download Speeds

On all of O2’s unlimited data SIM cards, you’ll get access to 5G at no extra cost in 193 UK towns and cities. Simply tell them you have a 5G-ready device when ordering your SIM card online.

You can get 5G at no extra cost on O2. Simply choose the option for a 5G ready device.

On O2’s 5G network, you can expect an average download speed of around 150Mbps (with peak download speeds of up to 1,000Mbps). This is around six times faster than their 4G network which has average download speeds of around 25Mbps.

There are no speed restrictions on O2’s unlimited data SIM cards.

Fair Usage Policy

On O2’s unlimited data plan, there are three important fair usage limits worth being aware of:

  1. There’s a 650GB monthly fair usage limit. O2 has a monthly fair usage limit of 650GB on their unlimited data plan. They won’t actually stop you from going over this limit, but they say they reserve the right to “investigate your usage further” and to “transfer you to a more suitable plan” if you use more than 650GB twice within a six-month period.
  2. You can only tether to a maximum of 12 devices. Although it’s possible to use tethering or personal hotspot to share your data with other devices, this is limited to a maximum of 12 devices by O2’s terms and conditions for unlimited data.
  3. You can only use the SIM card inside a battery-powered mobile device. O2 says their unlimited data SIM card “must only be used in mobile devices that do not require to be plugged in order to work”. This is intended to prevent you from using the SIM card inside a router for 4G home broadband or 5G home broadband. However, you can still use it in a tablet or mobile broadband device.

In addition, a fair usage policy applies when you’re travelling outside the UK. This will allow you to use up to 25GB of data abroad in Europe each month.

Comparison to Alternatives

At present, O2’s unlimited data plan is available from £31 per month. If you’d like an alternative plan with unlimited data and the same coverage from O2, you can also consider the unlimited data plans from giffgaff and Tesco Mobile. This is because both giffgaff and Tesco also use coverage from O2’s network.

The following table shows a side-by-side comparison of unlimited data plans using coverage from O2:

NetworkMinutesTextsDataMonthly Cost
(may rise during contract)
Tesco MobileUnlimitedUnlimitedUnlimited£25.00
24 months
Tesco MobileUnlimitedUnlimitedUnlimited£30.00
12 months
24 months
24 months
12 months
12 months
1 month
1 month

giffgaff’s £25 plan with Always-On data gives you 4G speeds on the first 80GB per month. This is followed by a maximum speed of 384kbps for the rest of the month between 8am and midnight each day (equivalent to a basic 3G connection). You’ll need giffgaff’s £35 plan for unlimited data with uncapped download speeds on 5G.

On Tesco Mobile, uncapped 5G download speeds are available on all unlimited data plans from £25 per month.

Other Mobile Networks

If you’re also willing to consider other mobile networks for your unlimited data plan, the following table shows a side-by-side comparison of your alternative options:

NetworkMinutesTextsDataMonthly Cost
(may rise during contract)
1 month
iD MobileUnlimitedUnlimitedUnlimited£16.00
24 months
24 months
Lebara MobileUnlimitedUnlimitedUnlimited£22.50
12 months
Tesco MobileUnlimitedUnlimitedUnlimited£25.00
24 months
24 months
10Mbps max
24 months
24 months
24 months
1 month
1 month

For more information, see our full guide to unlimited data plans in the UK.

Network & Coverage

2G, 3G & 4G Coverage

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

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

Check O2 Coverage (o2.co.uk) →

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

For more information, see our guide to O2’s coverage in the UK.

5G Coverage

If you have a 5G phone, you can also access O2’s 5G network at no extra cost in 193 UK towns and cities. This gives you access to an average download speed of 150Mbps (around six times faster than 4G) along with more network capacity and a lower amount of latency.

At present, you can get 5G coverage from O2 in all of the following UK towns and cities:

Now Live193 towns and cities are live on O2 5G (February 2024)
Aberdeen, Allesley, Altrincham, Ambleside, Ashford, Aughton, Aylesbury, Banbury, Banstead, Basildon, Basingstoke, Beaconsfield, Bedford, Belfast, Bilston, Birkenhead, Birmingham, Birstall, Blackburn, Blackpool, Blaydon, Bolton, Bournemouth, Bradford, Bradley Stoke, Bridge of Don, Brighton, Bristol, Brombourgh, Burton upon Trent, Bury St Edmunds, Byfleet, Calverley, Cambridge, Cardiff, Chadwell St Mary, Chatham, Cheadle, Chelmsford, Cheltenham, Chertsey, Chesterfield, Chilworth, Chipstead, Clacton-on-Sea, Colchester, Coventry, Danderhall, Darlington, Dartford, Derby, Dewsbury, Dinas Powys, Doncaster, Dudley, Dundee, Dunstable, Durham, Dyce, Eastbourne, Edinburgh, Egham, Epsom, Esher, Eton, Falmer, Gateshead, Gatton Bottom, Gillingham, Glasgow, Gloucester, Gravesend, Grays, Great Yarmouth, Grimsby, Guildford, Halifax, Harlington London, Harlow, Hastings, Hebburn, Hemel Hempstead, Hextable, High Wycombe, Horwich, Hove, How Wood, Huddersfield, Hull, Inverness, Ipswich, Iver, Jarrow, Joyden’s Wood, Kemprow, Kettering, Lancaster, Leeds, Leicester, Lincoln, Lisburn, Liverpool, Llandudno, London, Longford, Loughborough, Lowestoft, Luton, Maidenhead, Maidstone, Manchester, Mansfield, Middlesbrough, Milton Keynes, Molesey, Monifieth, Morley, Musselburgh, New Denham, Newbury, Newcastle, Newcastle-under-Lyme, Newtownabbey, North Shields, Northampton, Norwich, Nottingham, Nuneaton, Oldham, Orpington, Oxford, Penarth, Peterborough, Plymouth, Plympton, Portsmouth, Potters Bar, Rainham, Reading, Redhill, Richings Park, Rochdale, Rotherham, Royal Leamington Spa, Royal Tunbridge Wells, Rugby, Salford, Sheffield, Shelf, Shepperton Green, Shinfield, Shirehampton, Slough, Solihull, South Shields, Southampton, Southend-On-Sea, St Albans, Staines-upon-Thames, Stapleford, Stevenage, Stockport, Stockton-on-Tees, Stoke-on-Trent, Stranraer, Sunbury, Sunderland, Swansea, Swindon, Tatling End, Thornaby-on-Tees, Thorpe, Thundersley, Trumps Green, Tynemouth, Virginia Water, Wakefield, Wallasey, Waltham Abbey, Warrington, Washington, Watford, Wavertree, West Bromwich, Weybridge, Whickham, Whitley Bay, Wickersley, Windsor, Wolverhampton, Worthing, Wythenshawe, York

For more information, see our full guide to 5G coverage in the UK. Alternatively, there’s more information on the O2 website.

Tethering & Personal Hotspot

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

On O2’s unlimited data plans, tethering and personal hotspot usage is allowed. However, there’s a restriction within the terms and conditions that says you can only use it 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 networks, there is no restriction on how many devices you can use tethering or personal hotspot with. For this reason, if you’re likely to make heavy use of this feature, you might be better off choosing unlimited data on another network.

International Roaming

You can continue using your O2 SIM card when you travel abroad, but you’ll be subject to their fair usage policy for roaming.

If you’re travelling to one of 48 destinations in O2’s Europe Zone, you’ll be able to use up to 25GB of data abroad at no extra cost each month. Above this, you’ll pay a surcharge of £3 per GB.

If you’re travelling to one of 27 destinations that are part of the O2’s Travel Inclusive Zone, there’s a fair usage limit of 120 minutes and 120 texts each data. O2 says they’ll “manage [data] traffic and may need to slow down speeds depending on usage”. There’s no current fair usage limit published for data abroad. However, O2 has previously stated that speeds will be slowed down once you’ve used more than 150MB per day (or more than 50MB of data on streaming in one day).

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

Keeping Your Phone Number

If you’re moving from another 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 unlimited data SIM card from the O2 website. When it 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?
On O2, you can currently get an unlimited data plan from £31/month. This comes with 5G at no extra cost and 6 months of free Apple Music. You can also choose from 6 months of free Disney+ or 12 months of Amazon Prime Video.
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”.
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 restrict this to a maximum of 12 devices.
What download speeds will I get?
If you’re using a 5G phone in a 5G coverage area, you can access average download speeds of around 150Mbps on O2’s 5G network. Meanwhile, if you’re using O2’s 4G network, you can expect average download speeds of about 25Mbps.
What coverage will I get on O2’s unlimited data plan?
On O2’s unlimited data plan, you’ll have access to the following coverage:
  • 5G Coverage: 193 UK towns and cities
  • 4G Coverage: 99% population coverage
  • 3G Coverage: 99% population coverage
  • 2G Coverage: 99% population coverage
Can I use my unlimited data plan when travelling abroad?
Yes. It’s possible to use up to 25GB of data per month when travelling abroad in 48 European destinations. In addition, you’ll get unlimited data for use in 27 destinations outside Europe, though speeds might be slowed down based on your usage.
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 about O2’s unlimited data plan, please see O2’s official website. You can also read our full overview of unlimited data plans in the UK.

Your Comments 8 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 8 comments from readers. You can add your own comment here.

  • Mr C Harrison said:

    I have the o2 sim in a tplink 4g router, it works fine, they do throttle your speeds under fair usaged even if you download 50gig in a day, so o2 is a little frustrating. I would use virgin if you can them instead

  • Hmm, this is interesting… o2 have a clause in their fair usage policy:

    “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.”

    So at first I thought… they can’t do that because of the OFCOM investigation. So I had a look through the OFCOM document which states (with reference to its ruling on Three):

    “[Three must] withdraw restrictions on the use of handset SIMs in Dongles and MiFi”

    Furthermore the document defines a Dongle or Mifi as:

    “Wireless devices that enable multiple users to share a single mobile broadband connection while they are on the go.”

    I cannot find anywhere on the OFCOM website where it says that a SIM may be used in *any* device. So I’m wondering if o2 have found a loophole here. Or alternatively, perhaps I am not looking hard enough for the information from OFCOM and o2 have got this wrong.

    I’d love to hear your thoughts on this!

  • Shelley Bourne said:


    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,

      • 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 🙂

          • 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.

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