O2 offers Big Bundle packages from £10/month on Pay As You Go. The bundles come with a one-month allowance of 4G internet, minutes and texts.

In the UK, customers on O2 Pay As You Go can convert their Pay As You Go credit into a Big Bundle package. The Big Bundle will give you a one-month allowance of calls, texts and mobile internet, with bundles ranging in price from £10 to £30 per month.

The most popular Big Bundle package costs £10/month and includes 250 minutes, 1000 texts and 2GB of 4G internet.

In this article, we’ll review O2’s Big Bundles tariff. We’ll look at the bundles available on O2 and how they compare to the bundles available on other mobile networks. We’ll also look at the level of coverage you can expect on O2 and how to keep your existing phone number when moving to the network.

Stop Press: giffgaff is a low-cost sub-brand of O2, offering larger allowances for a lower monthly price (e.g. unlimited minutes, unlimited texts and 3GB of data for £10/month). If you’re a customer of O2 Pay As You Go, you can save money whilst getting the exact same coverage by switching to giffgaff.

Order giffgaff SIM card (Free) →

Bundles & Pricing

O2 Cat - SIM Card

In the UK, O2 is one of the largest mainstream Pay As You Go mobile networks. They currently offer a choice of three different Pay As You Go tariffs:

  • Big Bundles: With Big Bundles, your top-up will be converted automatically into a one-month allowance of calls, texts and mobile internet. Any unused allowances will expire at the end of the month.
  • Classic Pay As You Go: With Classic Pay As You Go, you pay for your usage on a per-minute, per-text and per-megabyte basis. Your credit won’t expire providing your SIM card remains active, and there’s no need to top-up every month. This makes it a better option for people who rarely use their mobile phone.
  • International: This is O2’s specialist SIM card for international calling. With International SIM, you can call abroad from 1p/minute.

By default, new customers will be enrolled on the Big Bundles tariff (this is unless you specifically choose a Classic Pay As You Go or International SIM card during the order process).

If you’re a regular mobile user or someone who uses a smartphone, the Big Bundles tariff will typically work out to be better value. This is because you’ll get a relatively large allowance for a fixed monthly price e.g. 250 minutes, 1000 texts and 2GB of data for £10. Even if you were to only use a quarter of this, you could expect to pay about £40 on Classic Pay As You Go.

For light mobile users who don’t have a smartphone, Classic Pay As You Go may work out to be better value as it doesn’t require you to top-up every month.

Big Bundles

The £10 Big Bundle gives you 250 minutes, 1000 texts and 2GB internet.

On the O2 Big Bundles tariff, your Pay As You Go credit will be converted automatically into a one-month allowance of calls, texts and mobile internet.

At present, there are five Big Bundle packages you’re able to choose from:


All Big Bundle packages will last for one calendar month with any unused allowances expiring along with the bundle.

Upon the expiry of your bundle, O2 will try to renew the same bundle automatically on your account (this is providing you have enough Pay As You Go credit). If you don’t have enough credit for automatic renewal, the Big Bundle will be added when you next top-up your account.

Out of Bundle Charges

Top Up Logo
Out-of-bundle charges are 35p/minute, 15p/text and £1/day for up to 50MB of internet.

Customers who exceed the inclusive allowance on their Big Bundles package will pay O2’s standard Pay As You Go out-of-bundle rates. These are 35p/minute, 15p/text and £1/day for up to 50MB of data (this will buy you O2’s Web Daily bolt-on). If you use more than 50MB of data during one day, you’ll be charged another £1/day for up to 50MB of additional data.

The following table shows out-of-bundle rates on O2’s Big Bundles tariff:

Calling Rates:
Voice Calls 35p/minute (any network, any time)
Calls to Voicemail 30p/call (when outside of allowances)
Calls to Special Rate Numbers 55p/minute access charge
+ service charge from the company you’re calling
Messaging Rates:
Text Message (SMS) 15p
Picture Message (MMS) 45p
Internet Rates:
Mobile Internet £1/day (up to 50MB/day)

The prices in this table are stated for UK-to-UK only. If you’re travelling abroad or making an international phone call, higher charges will normally apply. Source for pricing information: O2 [1, 2].

Outgoing phone calls are charged for on a per-minute basis. This means the length of all phone calls will be rounded up to a full minute before the charge is calculated and deducted from your account. For instance, a 61-second phone call will be charged as 2 complete minutes (2 minutes x 35p/minute = 70p). There is also a minimum call charge equivalent to 1 minute (so you’ll pay a minimum of 35p per call).

The charges for calling abroad are typically much higher than for calling inside the UK (normally about £1.50/minute and 20p/text). If you buy a Big Bundle costing £20/month or more, O2 will offer you the same discounted rates as available on their International SIM card.

Classic Pay As You Go

O2 Classic Pay As You Go
The rates on Classic Pay As You Go are 3p/minute, 2p/text and 1p/MB.

Customers who only use their phone on a very occasional basis will potentially be better off choosing Classic Pay As You Go.

On Classic Pay As You Go, there’s no need to convert your credit into a one-month bundle of calls, texts and internet. Instead, it operates on a traditional Pay As You Go basis: you top-up your phone and your credit remains until the time when you actually use it.

Customers on Classic Pay As You Go will pay a discounted rate of 3p/minute, 2p/text and 1p/MB. It isn’t possible to buy a Big Bundle package when on the Classic Pay As You Go tariff.

For more information, please see the O2 website or read our full review of the tariff.

A Cheaper Alternative

Giffgaff GoodybagsFor a better value alternative to O2’s Big Bundles, we recommend joining giffgaff and getting one of their goodybag bundles.

giffgaff is a low-cost sub-brand of O2 offering goodybag bundles from £5/month. giffgaff uses the O2 network to provide the underlying coverage. You’ll therefore get the same underlying service as you’d get on O2, with the benefit of lower prices and larger allowances.

giffgaff currently offers a choice of seven goodybag bundles:

£5 Goodybag150500500MB£5.00
£7.50 Goodybag250Unlimited2GB£7.50
£10 GoodybagUnlimitedUnlimited3GB£10.00
£12 GoodybagUnlimitedUnlimited4GB£12.00
£15 GoodybagUnlimitedUnlimited8GB£15.00
£20 GoodybagUnlimitedUnlimited20GB£20.00
£25 GoodybagUnlimitedUnlimitedAlways-On£25.00

To give an example, giffgaff has a £10 goodybag with unlimited minutes, unlimited texts and 3GB of 4G internet. This is 50% more data compared to what you’d get on O2’s £10 Big Bundle (as well as the addition of unlimited minutes). Alternatively, giffgaff has a £7.50 goodybag with 250 minutes, unlimited texts and 2GB of data.

Customers without a goodybag bundle will pay 15p/minute, 5p/text and 5p/MB. You’ll get free giffgaff-to-giffgaff calls and texts providing you’ve topped up at least once in the last 3 months.

For more information, please see our full review of giffgaff. Alternatively, you can order a free SIM card from the giffgaff website.

Comparison to Alternatives

In the following section, we’ll compare O2’s Big Bundles to rival offerings from other mobile networks.

£5 per month bundles

5 Pound NoteOn O2, the cheapest Big Bundle package currently starts from £10/month. In contrast, some rival mobile networks have deals available from just £5/month.

If you’re a fairly light user, we’d recommend ordering a SIM card from giffgaff rather than O2. For just £5/month, you’ll get 150 minutes, 500 texts and 500MB of internet:

The following bundles are available for £5/month:

ASDA Mobile1252,000500MB£5.00

For a lower-cost alternative to O2’s £10 Big Bundle, it’s worth investigating giffgaff’s £7.50 goodybag. This will give you 250 minutes, unlimited texts and 2GB of internet (the same allowances as on O2 but for £2.50 less).

The following bundles are available for £7/month:

ASDA Mobile300Unlimited2GB£7.00

£10 per month bundles

10 Pound Note

At the £10/month price point, O2 is offering a Big Bundle with 250 minutes, 1000 texts and 2GB of internet.

For a better value alternative, we recommend having a look at giffgaff, the low-cost sub-brand of O2. For the same £10 monthly top-up, giffgaff will give you 3GB of data. You’ll also get unlimited minutes and unlimited text texts on the £10 goodybag.

ASDA Mobile600Unlimited6GB£10.00

Order giffgaff SIM Card (Free) → Order ASDA Mobile SIM Card (Free) →

£15 per month bundles

15 Pound NotesO2 offers a £15 Big Bundle package with 500 minutes, 1000 texts and 5GB of internet.

For a better value alternative, giffgaff offers unlimited minutes, unlimited texts and 8GB of internet on their £15 goodybag (this is an extra 3GB of data compared to O2’s £15 Big Bundle).

ASDA Mobile1,000Unlimited12GB£15.00

£20 per month bundles

20 Pound NoteFor £20/month, O2 offers a Big Bundle with 1000 minutes, 2000 texts and 6GB of internet.

Larger allowances are available on giffgaff for just £15/month (giffgaff’s £15 goodybag comes with unlimited minutes, unlimited texts and 8GB of internet).

Alternatively, if you’d like a larger allowance around the £20 price point, you can choose giffgaff’s £20 goodybag with unlimited minutes, unlimited texts and 20GB of internet. A £25 goodybag is also available from giffgaff with Always-On data (unlimited downloads with 4G speeds on the first 20GB per month).

ASDA MobileUnlimitedUnlimited18GB£20.00
ASDA MobileUnlimitedUnlimited30GB£25.00

For more information, please see our full comparison of the UK’s best value Pay As You Go bundles.


2G, 3G and 4G Coverage

O2 offers 99% population coverage across the UK.

O2 offers 99% population coverage across the UK. At the time of writing, this includes 99% coverage on 2G, 98% coverage on 3G and 97% coverage on 4G. Customers on the Big Bundles tariff will have unrestricted access to all three types of coverage.

Before signing up to the Big Bundles tariff, we strongly recommended checking the O2 coverage in your area. You can do this by entering your postcode on O2’s online coverage map:

Check O2 Coverage (o2.co.uk) →

We’d typically recommend joining O2 only if you’re able to get at least 3G or 4G coverage indoors.

You’ll get the exact same coverage when using a free SIM card from giffgaff as you’d get when using an O2 SIM card in your phone.


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

It’s possible to tether on all O2 Pay As You Go tariffs, including when using one of the Big Bundles tariffs. If you’re using an older version of the iPhone, you may experience problems with this if your handset isn’t running iOS 10.1 or newer, with version 26.1 or later of the O2 carrier settings.

For more information, please see our in-depth article about tethering on UK mobile networks.

Joining Big Bundles

New Customers

Customers who are new to O2 can join Big Bundles in one of two ways: either by buying a new Pay As You Go smartphone from O2 or by ordering a free Pay As You Go SIM card for their existing handset.

If you already have a handset that you’d like to use on O2, you should check to make sure your handset is unlocked. For more information, please see our step-by-step guides to unlocking an iPhone and unlocking a Samsung Galaxy smartphone.

Existing O2 Customers

If you already have an O2 Pay & Go SIM card, you can switch to the Big Bundles tariff at any time. You can also change the Big Bundle on your account by sending a text message as follows to 21300:

Bundle Required Bundle Code for Opting In
£10/month Data Big Bundle (with 2GB data) Text 10DATABB to 21300
£15/month Data Big Bundle (with 5GB data) Text 15DATABB to 21300
£15/month Classic Big Bundle* (with 2GB data) Text 15BUNDLE to 21300
£20/month Data Big Bundle (with 6GB data) Text 20DATABB to 21300
£25/month Data Big Bundle (with 8GB data) Text 25DATABB to 21300
£30/month Data Big Bundle (with 20GB data) Text 30DATABB to 21300

* O2 offers an alternative £15 bundle with 750 minutes, 2000 texts and 2GB of internet. This bundle is no longer advertised to new customers, but can still be purchased by texting 15BUNDLE to 21300.

It’s also possible to change tariff by calling 2202 or by logging in to the My O2 website or by using the My O2 app.

Keeping Your Phone Number

It takes around one working day to transfer your phone number over to O2 Pay As You Go.

If you’re switching from another mobile network to O2, it’s a straightforward process to keep your existing phone number.

To do so, you’ll need to ask your current mobile network to provide you with a PAC Code. By law, they’ll need to provide this to you free of charge within two hours of your request.

Once you have that, you can order your new Pay As You Go handset or SIM card from the O2 website. After your new phone or SIM card arrives, you can provide your PAC Code to O2 through this online form. Once you’ve done that, your phone number transfer will be scheduled by O2, 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

Your current network provider:

  More Options

It isn’t possible to move Pay As You Go credit from your old mobile network to O2. You should therefore try to use it all up before moving your phone number to O2. The account on your old mobile network will be closed when you use a PAC Code and all unused credit will be lost.

More Information

For more information about Big Bundles, please see the official O2 website. You can also order a free O2 Pay As You Go SIM card on the Big Bundles tariff.

Your Comments 57 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 57 comments from readers. You can add your own comment here.

  • HI Ken.

    With an O2 Big Bundle Pay-as-you-go plan, is roaming in the Republic of Ireland included?



  • Hello Ken

    I have an O2 £10.00 bundle.

    Can you please advise how I will be charged when I am in Gran Canaria and need to telephone a friend in England on their mobile which is not on an O2 contract? (she is with Tesco mobile)

    Will my network data allowance reduce greatly?
    Will she be charged at all?

    Hope this makes sense!

    Many thanks, Alyson

    • Hi Alyson,
      Many thanks for your comment. Since the changes were made last year to European roaming charges, you’ll be able to use your UK allowances at no extra charge when travelling in the EU (Gran Canaria is included in this, as part of Spain). You can therefore use your inclusive allowances to call friends and family in the UK at no extra cost.
      With regards to your friend, she won’t need to pay anything extra to receive your phone call. In the UK, you’ll never be charged for picking up a phone call (all additional charges related to roaming are incurred by the person who goes abroad).
      Hope this helps!

    • Hello Ken

      Thank you for helping me again and your response was 100% correct. Very much appreciated.

      Now another question re my O2 £10.00 bundle. In Gran Canaria, I would like to occasionally be able to send a photo or important message using Facebook but, so far, cannot do so. If I have WIFI access, there is no problem, but if I am out and about and cannot access any internet network it is impossible. I contacted O2 but could only ascertain they do not have a contract with Spain (Gran Canaria) that will allow me internet access without WIFI. Can this be correct?

      Thank you again for your help….

      • Hi Alyson,
        No worries and really glad I could be of help!
        Are you able to access the internet at all when you’re out and about (e.g. using your web browser or other applications like WhatsApp)? If not, it sounds like the “data roaming” setting has just been switched off on your phone – there’s more information here about how to enable it. Once you’ve done that, you should be able to use Facebook, WhatsApp, etc when you’re out and about. After returning to the UK, I’d probably recommend switching the setting off again (just in case you go somewhere outside of Europe in the future where data roaming won’t be chargeable).
        Hope this helps,

        • Hi Ken

          Thank you for your prompt response.

          I have now spent over 90 minutes undertaking an online ‘chat’ with 02. The problem that I am unable to get network (internet) coverage remains unresolved.

          In brief, during the online ‘chat’ it was confirmed that ‘roaming’ is switched on.

          I was requested to try networks – YOIGO, Vodafone ES.
          Movistar and Orange ES – no internet connection was possible with any of these providers.

          It was suggested Network Mode 3G only be set on my phone – this also did not work, ie no internet connection.

          A 5 day working timescale has been raised. Apparently O2 are going to correspond with networks in Spain now.

          When I bought my Samsung Galaxy A5 smartphone with the 02 £10.00 PAYG bundle I was led to believe there would be no problem accessing the internet in Spain (Gran Canaria). It appears however this is only possible with WIFI access.

          I do not think there is anything further I can do. Do you agree?

          Thank you.

          • Hi Alyson,
            Thanks for getting back to me on this. Unfortunately, I don’t really know what to suggest except from continuing to persevere with O2 to resolve this for you. I do believe your service should work in Gran Canaria, so it is likely that this is being caused by a problem on their side. If you like, you can lodge a formal complaint in writing with O2 as they may consider giving you a refund for part of the service you weren’t able to use. Do please keep me updated, and let me if you get to a resolution with O2.

          • Hi Ken – I feel like you are my ‘penfriend’ with my continued correspondence! You are so knowledgeable and down to earth and your advice is much appreciated. I will certainly keep you updated with O2’s response and I will lodge a complaint with them. Thanks, as always. Alyson

          • Hello Ken

            Thank you for your response dated 25 Feb at 6.34

            The update is I received a ‘phone call from O2 in Leeds, UK.

            Once I had confirmed data roaming was set on my smartphone, I was directed to “Access Point Names”. I had to add a new Access Point Name and with the information given, now have Internet data access!
            I have looked at information of my previous Access Point Name and the only difference I can see is the Username is now ‘o2web’ where previously it was ‘payandgo’.

            I am so pleased this has been resolved and thank you for your support.

          • Hi Alyson,
            Thank you for the update – I’m really pleased to know the problem was resolved for you, and thank you also for sharing the solution with me (I’ll bear this in mind if anyone asks the same question in the future). Hope you enjoy the rest of your time in Gran Canaria – I hope it is pleasantly warm (at the very least, warmer and less snowy than it is in the UK ;)).

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