Scheda SIM Giffgaff - Preattivata e pronta all'uso (UK)
Credit your account: You perform the official Giffgaff Top-Up via the Giffgaff website/app. Since Giffgaff uses the O2 network, O2 top-up vouchers will work on Giffgaff. The credit/top-up is paid by you directly to Giffgaff.