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

Cheap O2 Sim Only Deals

Here are the cheapest O2 Sim deals.

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● Currently your filters are set to 5GB+ 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).
6GB
5G data
Unltd Minutes
Unltd Texts
12mthContract
Monthly cost
£6.99/mth
Monthly cost will rise every April by inflation (RPI) plus 3.9%
15GB
5G data
Unltd Minutes
Unltd Texts
12mthContract
Monthly cost
£7.99/mth
Monthly cost will rise every April by inflation (RPI) plus 3.9%
30GB
5G data
Unltd Minutes
Unltd Texts
12mthContract
Monthly cost
£9.99/mth
Monthly cost will rise every April by inflation (RPI) plus 3.9%
50GB
5G data
Unltd Minutes
Unltd Texts
12mthContract
Monthly cost
£10/mth
Monthly cost will rise every April by inflation (RPI) plus 3.9%
10GB
4G Data
Unltd Minutes
Unltd Texts
PAYG
Monthly cost
£10/mth
O2 Customer service
No Wi-Fi calling 
No 4G calling 
O2
Customer service
Get deal*
Via O2
100GB
5G data
Unltd Minutes
Unltd Texts
12mthContract
Monthly cost
£15/mth
Monthly cost will rise every April by inflation (RPI) plus 3.9%
30GB
4G Data
Unltd Minutes
Unltd Texts
PAYG
Monthly cost
£15/mth
O2 Customer service
No Wi-Fi calling 
No 4G calling 
O2
Customer service
Get deal*
Via O2
250GB
5G data
Unltd Minutes
Unltd Texts
12mthContract
Monthly cost
£18/mth
Monthly cost will rise every April by inflation (RPI) plus 3.9%
50GB
4G Data
Unltd Minutes
Unltd Texts
PAYG
Monthly cost
£20/mth
O2 Customer service
No Wi-Fi calling 
No 4G calling 
O2
Customer service
Get deal*
Via O2
150GB
4G Data
Unltd Minutes
Unltd Texts
PAYG
Monthly cost
£30/mth
O2 Customer service
No Wi-Fi calling 
No 4G calling 
O2
Customer service
Get deal*
Via O2

Is O2 a good network?

O2 is one of the four main networks in the UK and most recent customer service poll, O2 scored 5.7/10 based on 714 votes.

What O2 specific perks can you get with an O2 sim?

If you're on an O2 Sim, you also have access to its perks, including:

O2 Priority: Gives exclusive discounts, early access to tickets, and surprise treats.

O2 Wi-Fi Hotspots: Gives you access to its Wi-Fi hotspots across the UK. And if you're struggling for signal, and it's available in your area, you will be automatically connected to its Wi-Fi Extra network to help keep you connected.

Inclusive EU Roaming - O2 allows you to use your UK allowance within Europe at no extra cost, though there is a 'fair use' policy on data, so you can use a maximum of 25GB of data per month from your allowance in Europe without incurring extra costs.

Which is the best sim only plan for me?

Choosing the right sim-only plan can seem complicated, and you'll have your own set of requirements, but here are some factors to consider when picking:

Your data needs - Are you a data-hungry streamer or a casual browser? Tailor your plan to your data habits to avoid overpaying or running out when you need it most.

Contract length - Whether you're willing to commit to a contract or want the flexibility to switch plans, O2 offers various contract lengths. Shorter contracts may offer flexibility, while longer ones are usually cheaper.

Roaming - If you're a jet-setter, O2 allows you to use your UK allowance within Europe at no extra (up to 25GB of data per month).

Remember, the best sim-only plan is the one that aligns with your needs.

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 £6.99/month and it currently offers unlimited minutes & texts and 6GB/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 you get pay as you go sims from O2?

For those who prefer the pay-as-you-go (PAYG) flexibility, O2 offers PAYG sims that allow you to top up as you go, giving you control over your spending longdash good for light users or those that just want to keep things simple.

Can you get unlimited data sims?

If streaming, gaming, and browsing are part of your daily routine, O2's unlimited data sims are the answer to your data cravings. Currently, the cheapest unlimited O2 Sim starts from Free/month.

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.