How to activate GIFFGAFF replacement sim with existing number LOST SIM

Описание: If your giffgaff SIM card is broken, you can replace it with a new SIM. This is what Giffgaff call a 'SIM swap'. Performing a SIM Swap transfers your Giffgaff mobile number and any airtime credit or goodybags you have active with us onto a new, unactivated SIM card. There is no purchase required when SIM Swapping and the process only works on an unactivated SIM, therefore you won't get a new number and retain your current number instead