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Find the best SIM for your device

Explore our SIM deals

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Pay Monthly SIMs

Keep the phone you love and get all the data you need. Take your pick from our 12 and 24-month Pay Monthly SIM Only deals.

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More data, same price

Get more data for up to three months at no extra cost, with selected Pay As You Go SIMs. Ends 1 July 2026.

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Latest Pay Monthly offers

Snap up a hot saving on SIM Only

Save up to £240 with a 24-month Unlimited Plus Plan. 23.99 a month. Rises to £26.49 Apr ’27, £28.99 Apr ’28. Cancellation rights apply.

Summer looks better with SIM Only

Low price. 150GB Plus Plan only £20.99 a month. 24-month contract. Rises to £23.49 Apr ’27, £25.99 Apr ’28. Cancellation rights apply.

Pay As You Go SIMs

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Big Bundles

Enjoy awesome perks and great-value tariffs with unlimited minutes and texts

Rolling plans

The easiest way to pay without a contract

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Need to top up?

Find out how to top up your Pay As You Go devices

Perks for being with O2

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Data rollover

Didn’t get through all your data? Let’s keep it rolling.

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Roam freely in the EU

Unlike other major networks, we don't charge extra for EU roaming, up to 25GB

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Priority

Jump into a world of exclusive rewards and experiences. It’s our way of saying thanks for being with us.

Looking for another SIM?

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Tablet SIMs

Pick a SIM for your tablet or dongle

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Smartwatch eSIMs

Connect your cellular smartwatch with a Pay Monthly eSIM

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Mobile broadband SIMs

Stay connected while you’re on the move