My fake calls in the past few days are from Nicaragua, Sierra Leone, South Sudan, Bosnia & Hertegovina, Australia and Estonia. I was advised by shop staff to block international calls, but this is a work phone and my international clients (and family overseas) still need to be able to call me.
Interestingly my Telecom phone has never received one of these fake calls. So not only has the Vodafone network reduced coverage significantly in my area, it is the only one receiving the fake calls and seemingly unable to do anything about them.
My apathy regarding the hassle of change is rapidly diminishing.
Blocking international calls will only block outgoing not incoming calls and the CLI you see displayed on the phone is spoofed (fake) as explained before it's the game of whack a mole to block these scammers
Ex VodafoneNZ staff member 17+ years and if you want real help from real people check out www.geekzone.co.nz