O2 SIM only deals: comparing their best plans in April

Our favourite current O2 SIM only deal

We'd say the best SIM only plan O2 are selling this April is their 24‑month unlimited data deal below, which comes in at £32.99 a month and includes unlimited minutes and texts too:

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £32.99 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Retail Price Index rate of inflation published in February + 3.9%

While this is a good enough deal to make it into the best of O2's SIMs, you can beat it for price (even if you definitely want a provider that uses the O2 network). Here's which other networks can beat it:

Cheaper alternatives to this deal

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £16 a month (1‑month plan, no contract)
See full deal

Returns to £20 after a year
🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £16 a month (1‑month contract)
See full deal

🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £17 a month (1‑month contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £26 a month (12‑month contract)
£100 Currys gift card (automatic, no need to claim)
See full deal

🛈 Monthly price + out of bundle charges will increase every April by the Consumer Price Index rate of inflation + 3.9%

Unlimited minutes + Unlimited texts + 0MB Unlimited data (3G) = £0 £20 a month (1‑month plan, no contract)
See full deal

2 Mbps speed cap
🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £22 £20 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £22.50 a month (12‑month contract)
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🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £12.50 a month for 1 month, then £25 (1‑month contract)
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3G speeds after 650GB. Use promo code: simsherpa
🛈 Prices reduce over time!

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £35 £25 a month (18‑month contract)
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🛈 No mid-contract price rises

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £25 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in January + 3.9%

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £16 a month for 6 months, then £32 (24‑month contract)
See full deal

Speed capped to 100 Mbps
🛈 Monthly price will increase after March 31st each year by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £34.90 £29.90 a month (1‑month plan, no contract)
See full deal

🛈 No price rises in 2024

£20.99 for 30GB is O2's next best SIM deal in April

For a smaller amount of data, you might like the £20.99 SIM only deal running on O2 at the moment. It's a 24‑month plan, which comes with 30GB data, unlimited minutes and texts too:

Unlimited minutes + Unlimited texts + 0MB 30GB data (5G) = £0 £20.99 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Retail Price Index rate of inflation published in February + 3.9%

It's a good enough deal to get into O2's best SIMs but you can actually get a lower price for a similar plan elsewhere, even if you definitely want it to use the O2 network. See where you can get it for less here:

Cheaper alternatives to this deal

Unlimited minutes + Unlimited texts + 0MB 30GB data (5G) = £0 £10 a month (12‑month contract)
£25 Currys gift card (automatic, no need to claim)
See full deal

🛈 Monthly price + out of bundle charges will increase every April by the Consumer Price Index rate of inflation + 3.9%

Unlimited minutes + Unlimited texts + 0MB 50GB data (5G) = £0 £7.95 a month (1‑month contract)
See full deal

🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 16GB 50GB data (5G) = £0 £8 a month (1‑month plan, no contract)
See full deal

Returns to 16GB after a year
🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB 30GB data (5G) = £0 £8 a month (1‑month contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB 30GB data (5G) = £16 £8 a month (12‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited minutes + Unlimited texts + 0MB 30GB data (5G) = £0 £9.90 a month (1‑month plan, no contract)
See full deal

🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 20GB 60GB data (5G) = £0 £12 a month (1‑month plan, no contract)
See full deal

🛈 VOXI reserve the right to increase the cost of this plan annually with one month's notice

Unlimited minutes + Unlimited texts + 0MB 60GB data (5G) = £0 £12 a month (12‑month contract)
See full deal

🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 10GB 30GB data (5G) = £0 £12 a month (12‑month contract)
See full deal

🛈 No mid-contract price rises

Unlimited minutes + Unlimited texts + 0MB 60GB data (5G) = £15 £13 a month (24‑month contract)
£20 Clubcard voucher (automatic, no need to claim)
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🛈 No annual price rise for Clubcard holders

Unlimited minutes + Unlimited texts + 10GB 30GB data (5G) = £0 £13 a month (1‑month contract)
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🛈 Monthly price will increase each March by the Consumer Price Index rate of inflation published in January + 3.9%

Unlimited minutes + Unlimited texts + 0MB 30GB data (5G) = £0 £13.50 a month (12‑month contract)
See full deal

🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 0MB 50GB data (5G) = £0 £15 a month (1‑month plan, no contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB 40GB data (5G) = £0 £15 a month (18‑month contract)
See full deal

🛈 No mid-contract price rises

 minutes +  texts + 0MB 0MB data (G) = £0 £0 a month (1‑month plan, no contract)
See full deal

🛈

Unlimited minutes + Unlimited texts + 0MB Unlimited data (3G) = £0 £20 a month (1‑month plan, no contract)
See full deal

2 Mbps speed cap
🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice

There's also a nice 150GB for £23.99 plan with them this month

For people who need more data, we'd say this is one of O2's best deals on SIM only this month too. It's a 24‑month plan, comes with 150GB data, unlimited minutes and texts for £23.99 a month:

Unlimited minutes + Unlimited texts + 0MB 150GB data (5G) = £0 £23.99 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Retail Price Index rate of inflation published in February + 3.9%

It might not be the lowest-cost SIM only deal with 150GB data or more on the entire market but if you're sure you need a SIM using the O2 network, it is the best-priced. Here are the networks offering it cheaper:

Cheaper alternatives to this deal

Unlimited minutes + Unlimited texts + 0MB 200GB data (5G) = £0 £16 a month (12‑month contract)
£50 Currys gift card (automatic, no need to claim)
See full deal

🛈 Monthly price + out of bundle charges will increase every April by the Consumer Price Index rate of inflation + 3.9%

Unlimited minutes + Unlimited texts + 0MB 250GB data (5G) = £0 £13.95 a month (12‑month contract)
See full deal

🛈 No price rises in 2024

Unlimited minutes + Unlimited texts + 0MB 150GB data (5G) = £0 £14 a month (24‑month contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB 150GB data (5G) = £0 £15 a month (1‑month plan, no contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB Unlimited data (3G) = £0 £20 a month (1‑month plan, no contract)
See full deal

2 Mbps speed cap
🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £22 £20 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited minutes + Unlimited texts + 100GB 300GB data (5G) = £0 £20 a month (1‑month plan, no contract)
See full deal

🛈 VOXI reserve the right to increase the cost of this plan annually with one month's notice

Unlimited minutes + Unlimited texts + 0MB 200GB data (5G) = £30 £20 a month (1‑month plan, no contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £22.50 a month (12‑month contract)
See full deal

🛈 No price rises in 2024

O2’s SIM only prices and benefits compared

In our full review of the O2 network we said we liked their brilliant call signal (3G/2G) coverage, their good 5G coverage and their great WiFi hotspot scheme. We also like their WiFi calling and 4G calling.

You have the choice of 1-month, 12-month and 24-month contracts. Their 24-month contracts are usually much cheaper per month, but it’s best to check their current deals for the best possible offer.

O2’s deals tend to be some of the most expensive of all networks, but they’re a bit more competitive on big data deals. There are some smaller providers on O2’s network who offer better value SIM only deals.

They’re also the only main UK network to still offer inclusive EU roaming on all plans. And you can get extras on premium plans, such as subscriptions to entertainment services and worldwide roaming data passes.

Useful link: Read our full O2 review

Other things to know about O2’s SIM only deals

You’ll get your O2 SIM card between 1-4 working days after ordering (depends on your location). And there are premium delivery options too. You’ll receive each size of SIM for any phone. Or you can take an eSIM.

When your SIM arrives, you have 14 days to return it and get a full refund if you’re not satisfied. This will also cancel your contract. Here’s how you do that.

To prevent customers racking up huge bills they can’t pay, O2 make you pass a credit check to join them. If you have a poor or no credit history you can still join O2 on a PAYG monthly bundle instead.

And if you’re switching to O2 from another network you can keep your number by requesting a PAC from your old provider and giving it to O2 at any point. Here’s how you do that.

Useful link: Compare all O2 SIMs