MoneySavingExpert Founder, Martin Lewis · Editor-in-Chief, Marcus Herbert Chair, Martin Lewis · Editor, Marcus Herbert

Cheap O2 Sim cards

Here are the cheapest O2 Sim deals.

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● Currently your filters are set to 3GB+ data, 200+ mins and 500+ texts - but you can change them to suit you.
● These are today's prices, but providers often increase prices in line with inflation or a set % during the contract.
● All deals are for new customers. Existing customer? Call your provider to see if it'll offer you it (see haggling help).
20GB
5G data
UnltdUnltd Minutes
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12mthContract
Monthly cost
£8/mth
7GB
Data
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PAYG
Monthly cost
£10/mth
40GB
5G data
UnltdUnltd Minutes
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12mthContract
Monthly cost
£11/mth
20GB
Data
UnltdUnltd Minutes
UnltdUnltd Texts
PAYG
Monthly cost
£15/mth
75GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
24mthContract
Monthly cost
£18/mth
120GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
24mthContract
Monthly cost
£20/mth
100GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
12mthContract
Monthly cost
£20/mth
30GB
Data
UnltdUnltd Minutes
UnltdUnltd Texts
PAYG
Monthly cost
£20/mth
150GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
24mthContract
Monthly cost
£22/mth
5GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
1mthContract
Monthly cost
£23/mth
150GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
12mthContract
Monthly cost
£24/mth
250GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
24mthContract
Monthly cost
£25/mth
20GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
1mthContract
Monthly cost
£26/mth
250GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
12mthContract
Monthly cost
£28/mth
UnltdUnltd
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
24mthContract
Monthly cost
£30/mth
100GB
Data
UnltdUnltd Minutes
UnltdUnltd Texts
PAYG
Monthly cost
£30/mth
50GB
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
1mthContract
Monthly cost
£30/mth
UnltdUnltd
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
12mthContract
Monthly cost
£32/mth
UnltdUnltd
5G data
UnltdUnltd Minutes
UnltdUnltd Texts
1mthContract
Monthly cost
£36/mth

Is O2 a good network?

O2 is one of the four main networks in the UK and in our most recent customer service poll, O2 scored 5.8/10 based on 559 votes.

Does O2 offer Sim plans for bad credit?

O2 offers a basic PAYG Sim which doesn't require a credit check. But it no longer offers 'traditional' PAYG (where a customer tops up using credit and uses that for calls, texts and data). Instead, it offers data bundles, which start from £10/month.

The cheapest O2 Sim

The cheapest O2 Sim costs £8/month and it currently offers unlimited minutes & texts and 20GB/month data over a 12-month contract. See cheap O2 Sims.

Can I keep my mobile number if I switch to an O2 Sim-only deal?

Yes, you can keep your old mobile phone number. If you're moving from another network, you'll need to text 'PAC' for free to 65075 to request your PAC (porting authorisation code). You will need to provide this to O2 which should move your number over within one working day.

If you are already an O2 customer, you'll need to fill in a 'keep my number' form on its website.

Can I use my O2 Sim abroad?

O2 allows you to use your allowance in the EU without extra charges. However, if your plan comes with more than 25GB of data, you'll only be able to use up to 25GB of data within the EU, which is more than enough for most. For more info, see Cheap Roaming.

Can I get 5G enabled O2 Sims?

Yes, O2 offers 5G on all its Sims. However, be aware you'll need a 5G-compatible phone too.