O2 Sim Card - New and Sealed Classic O2 Pay As You Go 02 O2 PAYG SIM Alarm Watch
3 in 1 SIM gives the option for Micro, Nano or Standard Sim size. 1 x O2 SIMCARD(3in1 SIM gives Nano/Micro/Standard option). Just ensure to make a chargable call or text in a 6 month rolling period to keep the SIM active with O2.