†Monthly price of your Airtime Plan will increase by £1.80 each April, except Data Only and Smartwatch Plans which will increase by 75p.

SIM cards

Pick the best deal for your device

Pay Monthly SIMs

Get all the data you need without changing your phone. Choose from our 12 and 24 month Pay Monthly SIM deals.

Choose a SIM

40GB data for £16 a month

24-month SIM Only Classic Plan. Airtime price rises to £17.80 from Apr ’26, £19.60 from Apr ’27.

Unlimited data for £23.99 a month

24-month SIM Only Unlimited Plus Plan. Airtime price rises to £25.79 from Apr ’26, £27.59 from Apr ’27.

100GB data Plus plan for £19.99 a month

24-month SIM Only Plus Plan. Airtime price rises to £21.79 from Apr ’26, £23.59 from Apr ’27.

Three SIM cards on top of each other on blue background

Browse our best SIM deals

Get more Flexibility with a Pay As You Go SIM. Customise your monthly data allowance with our Big Bundles and Rolling plans.

Shop your SIM

Rolling plans

The easiest way to pay without a contract

Find out more

Tablet SIMs

Pick a SIM for your tablet or dongle

See the deals

Grab an Ultimate Plan

Pack on the perks with our SIM Only Ultimate Plan

Learn more

Business SIMs

Get a SIM only deal for your business phone

Find out more

Why choose a SIM only deal?

Keep your number

Even if you're joining from another network

Find out more

My O2

Manage your account 24/7

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Perks and prizes

Download the Priority app for exclusive offers

Find out more

Our network is a winner

We've been awarded Best Network Performance 2020 by Mobile News

Find out more

^{†Monthly price of your Airtime Plan will increase by £1.80 each April, except Data Only and Smartwatch Plans which will increase by 75p. Out of bundle charges increase by 5% every 1 April. See}^{https://www.o2.co.uk/prices}