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 500 minutes, 5000 texts and 2GB of 4G internet. Data rollover is available when you renew your Big Bundle automatically, making it possible for you to roll over up to an additional 2GB 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 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. Unused allowances will expire at the end of the month, except from unused data which is eligible for rollover.
  • 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 usually be enrolled on the Big Bundles tariff (this is unless you specifically choose either a Classic Pay As You Go or International SIM card during the order process).

If you’re a regular mobile user or smartphone owner, 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. 500 minutes, 5000 texts and 2GB of data for £10. Even if you were to use only a half of your minutes and half of your data allowance, you would expect to pay around £17 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

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:

NetworkMinutesTextsInternetMonthly
Cost
O25005,0002GB£10.00
O21,0005,0005GB£15.00
O22,0005,0008GB£20.00
O23,0005,00010GB£25.00
O25,0005,00020GB£30.00

All Big Bundle packages will last for one calendar month. Unused allowances will expire along with the bundle, except from data which can be rolled over when you renew your bundle automatically. On your monthly anniversary date, O2 will attempt to renew the same bundle automatically from your Pay As You Go credit.

Data Rollover

O2 offers data rollover for your unused data allowance when renew your Big Bundle automatically at the end of the month. For instance, if you have 0.5GB of unused data on the £10 Data Big Bundle, you would receive an extra 0.5GB of data the following month. This would increase your normal 2GB allowance up to 2.5GB.

With data rollover, it’s worth being aware that your bundle needs to be renewed at the end of the month, without leaving any gaps. You can roll over up to 100% of your normal data allowance, so the £10 (2GB) bundle is subject to a total data cap of 4GB. The £15 (5GB) bundle is subject to a total data cap of 10GB, the £20 (8GB) bundle is capped at 16GB, the £25 (10GB) bundle is capped at 20GB and the £30 (20GB) bundle is capped at 40GB. You’ll lose your data rollover should you change your price plan or bundle.

For more information, see our guide to data rollover on UK mobile networks. As an alternative, we’d suggest also having a look at giffgaff. On giffgaff, you’ll get 3GB of data along with unlimited minutes and unlimited texts on the £10 goodybag. From your third goodybag purchase onwards, this is boosted up to 4GB per month giving you a simpler and more flexible alternative to O2’s data rollover feature.

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 amount 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 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:

TariffMinutesTextsInternetMonthly
Cost
£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 having the addition of unlimited minutes). Alternatively, giffgaff has a £7.50 goodybag with 250 minutes, unlimited texts and 2GB of data (the same amount of data but for £2.50 less than on O2).

On goodybags costing £10 or more, giffgaff will boost your monthly data allowance by 1GB from your third goodybag purchase onwards. This means you can have 4GB of data on the £10 goodybag, 9GB of data on the £15 goodybag, etc.

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:

NetworkMinutesTextsInternetMonthly
Cost
giffgaff150500500MB£5.00
ASDA Mobile1252,000250MB£5.00
EE100250150MB£5.00
Vodafone150250100MB£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 (£2.50 less than O2’s £10 Big Bundle but with the same 2GB of data).

The following bundles are available for £7/month:

NetworkMinutesTextsInternetMonthly
Cost
ASDA Mobile300Unlimited1GB£7.00
giffgaff250Unlimited2GB£7.50

£10 per month bundles

10 Pound Note

At the £10/month price point, O2 is offering a Big Bundle with 500 minutes, 5000 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 (boosted to 4GB from your third goodybag purchase onwards). You’ll also get unlimited minutes and unlimited texts on the £10 goodybag.

NetworkMinutesTextsInternetMonthly
Cost
giffgaffUnlimitedUnlimited3GB£10.00
ASDA Mobile600Unlimited3GB£10.00
O25005,0002GB£10.00
Vodafone250Unlimited2GB£10.00
EE250Unlimited1GB£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 1000 minutes, 5000 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).

NetworkMinutesTextsInternetMonthly
Cost
giffgaffUnlimitedUnlimited8GB£15.00
ASDA Mobile1,000Unlimited6GB£15.00
O21,0005,0005GB£15.00
EE1,000Unlimited2GB£15.00

£20 per month bundles

20 Pound NoteFor £20/month, O2 offers a Big Bundle with 1000 minutes, 2000 texts and 8GB 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).

NetworkMinutesTextsInternetMonthly
Cost
giffgaffUnlimitedUnlimited20GB£20.00
ASDA MobileUnlimitedUnlimited9GB£20.00
O22,0005,0008GB£20.00
Vodafone1,000Unlimited8GB£20.00
EE1,500Unlimited4GB£20.00
giffgaffUnlimitedUnlimitedAlways-On£25.00
ASDA MobileUnlimitedUnlimited15GB£25.00
O23,0005,00010GB£25.00
EE2,000Unlimited8GB£25.00

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

Coverage

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

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 current 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
£20/month Data Big Bundle (with 8GB data) Text 20DATABB to 21300
£25/month Data Big Bundle (with 10GB 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 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.

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