O2 is a leading European network operator and part of the Telefnica group. O2 has 37 million customers across Europe and is the fastest growing operator in the UK. O2s online channel has more than one million online customers, making it the leading online channel for mobile in Europe.
O2s online channel offers customers a choice of Pay Monthly contracts or Pay & Go. The Free SIM programme is part of the Pay & Go channel through which we promote free SIM cards to potential customers as a quick, easy and free way to join O2 as a Pay & Go customer.