Order your free sim and get a £10 bonus credit*
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Terms and conditions
*Get £10 extra credit special promotion: Open to new O2 PAYG sim customers only. Minimum £10 top up. 1 x £10 credit per mobile phone number. Top up must be activated on sim within 28 days of order. Subject to availability. No cash or alternatives. Big Bundles: Pay & Go only. Minimum monthly credit balance required for allowances for UK calls, texts and data only. Data allowance on £10, £15, £20, £25 and £30 bundles can be used for 4G and non-4G data. Accessing 4G data is subject to using a compatible 4G device and 4G network coverage. O2 Wifi subject to availability. Fair use policy and terms apply. See o2wifi.co.uk. O2 Rewards: opt in required, maximum reward £150 every three months. 5% for the first 6 months, 10% thereafter. Selected vouchers only. Minimum top up required each month. Existing customers and customers switching tariff need to opt in via text. Pay & Go service terms and Pay & Go Big Bundle Terms and Conditions apply. See o2.co.uk for full terms. Telefónica UK Limited, 260 Bath Road, Slough, Berkshire, SL1 4DX. Registered in England and Wales No.1743099. Registered Office as above.