Before you can use an O2 SIM card in your existing phone you may need to get your previous network or service provider to unlock the handset. You will need to wait until the expiry of any existing minimum term you have agreed and a charge may be payable. 30 days' notice required for cancellation. SIM Only 12 Month customers are subject to a minimum contract term of 12 months and are eligible for an upgrade after 9 months.
Inclusive minutesInclusive minutes can be used for calls to standard UK landlines (starting 01, 02 or 03) and all UK network mobiles. It excludes calls to non-geographic numbers (starting 05, 08), 07744 and 07755 numbers and premium rate (09) numbers.
Inclusive textYour inclusive text allowance can be used for UK text messaging. Picture messages to UK mobiles will be charged at 25p per message.
Data & Wi-FiUK data usage only.
Excessive usage policy applies to Unlimited Wi-Fi, where applicable. See full terms