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.

O2 Big BundlesIn the UK, customers on O2 Pay As You Go can convert their Pay As You Go credit into a Big Bundle package. This gives 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 packages cost £10/month. For £10/month, O2’s Data Big Bundle comes with 100 minutes, 100 texts and 1GB of 4G internet. Alternatively, customers wanting more minutes and texts can get the regular £10 Big Bundle with 250 minutes, 1000 texts and 500MB of data.

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 rival 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 much larger allowances for a lower monthly price (e.g. 500 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 switching to giffgaff whilst getting the exact same coverage.

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’ll 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.
  • 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).

For regular mobile users and for customers with a smartphone, the Big Bundles tariff will typically work out to be better value. This is because you’ll get a set allowance for a fixed monthly price (e.g. 100 minutes, 100 texts and 1GB of data for £10).

For lighter mobile users who don’t have a smartphone, Classic Pay As You Go may work out to be better value as it doesn’t have a minimum monthly top-up requirement.

Big Bundles

On O2’s 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 seven Big Bundle packages you’re able to choose from:


Please note: some of the above bundles may not be available when you order your SIM card online. However, you’ll be able to change to that bundle once the SIM card has arrived by texting the relevant bundle code from below.

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 remaining on your account). If you don’t have enough credit for the 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 Bundle package will pay O2’s 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 example, 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 £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 5p/minute, 5p/text and 5p/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 allowance 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 5p/minute, 5p/text and 5p/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 our full review of the tariff.

A Cheaper Alternative

Giffgaff Goodybag Icons - NewFor 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, using the same O2 network to provide the underlying coverage. You’ll therefore get the same underlying service as on O2, with the benefit of lower prices and larger allowances.

giffgaff currently offers a choice of seven goodybag bundles:

£5 Goodybag150500100MB£5.00
£7.50 Goodybag250Unlimited1GB£7.50
£10 Goodybag500Unlimited3GB£10.00
£12 Goodybag750Unlimited4GB£12.00
£15 Goodybag1,000Unlimited6GB£15.00
£18 Goodybag2,000Unlimited9GB£18.00
£20 GoodybagUnlimitedUnlimitedAlways-On£20.00

To give an example, giffgaff has a £10 goodybag with 500 minutes, unlimited texts and 3GB of 4G internet. This is five times as many minutes and three times as much data as you’d get on O2’s £10 Data Big Bundle. Alternatively, giffgaff has a £7.50 goodybag with 250 minutes, unlimited texts and 1GB 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 past 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 happy having coverage from EE rather than O2, we’d recommend ordering a free SIM card from ASDA Mobile. For just £7/month, you’ll get 300 minutes, 2000 texts and 1GB of 4G internet. This will save you £3 per month compared to O2’s £10 Data Big Bundle whilst giving you three times as many minutes and the same amount of data. You can check the coverage on ASDA Mobile in your area here.

The following bundles are available for £5/month:

ASDA Mobile1252,000200MB£5.00

The following bundles are available for £7/month:

ASDA Mobile300Unlimited1GB£7.00

£10 per month bundles

10 Pound Note

At the £10/month price point, O2 is offering a choice of two Big Bundles:

  • £10 Data Big Bundle: 100 minutes, 100 texts and 1GB of internet
  • £10 Big Bundle: 250 minutes, 1000 texts and 500MB of internet

When ordering a SIM card online, you’ll only be able to choose the £10 Data Big Bundle. However, if you’d like the regular £10 Big Bundle, you can switch to this by texting 10BUNDLE to 21300 after receiving your SIM card.

A better value deal compared to both of the above options can be found on giffgaff. For the same £10 monthly top-up, giffgaff can give you 3GB of data (that’s 3 times as much data as on O2’s £10 Data Big Bundle). You’ll also get more minutes and unlimited texting (500 minutes and unlimited texts on the £10 goodybag).

ASDA MobileUnlimitedUnlimited12GB£10.00
ASDA Mobile600Unlimited2GB£10.00

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

£15 per month bundles

15 Pound NotesO2 offers a choice of two bundles costing £15 per month:

  • £15 Data Big Bundle: 250 minutes, 250 texts and 4GB of internet
  • £15 Big Bundle: 750 minutes, 2000 texts and 2GB of internet

As before, you’ll only be able to choose the £15 Data Big Bundle when ordering your SIM card online. However, you can easily change to the regular £15 Big Bundle by texting 15BUNDLE to 21300 once your SIM card arrives.

For a better value alternative, giffgaff offers 1000 minutes, unlimited texts and 6GB of internet (this is four times as many minutes and an extra 2GB of data compared to O2’s £15 Data Big Bundle).

ASDA Mobile1,000Unlimited5GB£15.00

£20 per month bundles

20 Pound NoteFor £20/month, O2 offers a Data Big Bundle with 250 minutes, 250 texts and 6GB of internet.

For a better value alternative, choose giffgaff’s £18 goodybag with 2000 minutes, unlimited texts and 9GB of internet. Alternatively, giffgaff’s £20 goodybag comes with unlimited minutes, unlimited texts and Always-On data (unlimited downloads with 4G on the first 9GB per month).

ASDA MobileUnlimitedUnlimited8GB£20.00

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 78% coverage on 4G. O2 has made a public commitment to increasing this so they reach 98% coverage on 4G by the end of 2017.

On the Big Bundles tariff, customers will have access to all types of coverage including 2G, 3G and 4G.

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.

Before signing up to the O2 network, it may also be worth checking your coverage on ASDA Mobile (a cheaper alternative using the EE network). Alternatively, if you’re only able to receive a signal from O2, a free SIM card from giffgaff may offer you better value than O2.


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 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, 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 1GB data) Text 10DATABB to 21300
£10/month Big Bundle (with 500MB data) Text 10BUNDLE to 21300
£15/month Data Big Bundle (with 4GB data) Text 15DATABB to 21300
£15/month 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

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

Keeping Your Phone Number

Transfer Phone Number to O2 Big Bundles
It takes around one working day to transfer your phone number over to O2 Pay As You Go.

If you’re switching from another 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 O2’s website. After your new phone or SIM 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 transfer Pay As You Go credit from your old mobile network to O2. You should therefore try to use it up before moving your phone number to O2 (your account on your old mobile network will be closed when you use the PAC Code).

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 46 so far

We'd love to hear your thoughts and any questions you may have. So far, we've received 46 comments from readers. You can add your own comment here.

  • Jenny Mackenzie said:

    Hi Ken! As you know, I’ve written to you before expressing satisfaction with O2, but have just had a sobering reality check. I’ve had a £30 Big Bundle for over two years, which gave me 3,000 UK minutes, 4,000 texts + 20GB data. But it ran out on 31st July when I was in Switzerland for work. I arrived back yesterday to learn when I tried to renew my bundle that because I’d skipped a month, I had to accept the new, revised allowance and was gobsmacked to discover that minutes had been reduced to just one-sixth of what I got previously: 500 minutes; texts were worse: a mere one-eighth of my old allowance at 500; data was unchanged at 20GB. I now apparently have international minutes “from 1p a minute” but I did anyway cos I kept a healthy credit balance on O2 WorldChat. How can they get away with slashing their offering so drastically? (For comparison, at the same £30 price even the much-maligned Vodafone still offers 3,000 minutes, unlimited texts, 20GB data PLUS rollover of unused allowances to the next month.) O2 just lost a very loyal advocate!

    • Hi Jenny,
      Yes, unfortunately, O2 recently updated their bundles to reduce the number of minutes and to increase the amount of data (at least on lower-priced plans). It might be worth giving O2 Customer Services a quick call to see if they’ll possibly consider re-instating your minutes (you’re spending a fair bit with them so it’s possible they’ll overlook the skipped month and put you back on the old tariff). Alternatively, there are a number of mobile networks offering unlimited minutes & unlimited texts on Pay As You Go (e.g. £20/month on Three with 12GB of data, or £25/month with 30GB).

  • Wow thanks for this article… I got all the info I needed and way more informative than the O2 website itself. Brilliant!

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