> "One word: Backend." Sorry, I still don't get it. Telco's backend is a mess. It has a profusion of processes and frontend systems for customer service teams

> "One word: Backend." Sorry, I still don't get it. Telco's backend is a mess. It has a profusion of processes and frontend systems for customer service teams to interface with user records, which creates all sort of loopholes. Any sufficiently motivated attacker can pull a SIM swap attack, as it happens frequently, and the weak link is always a variation of: a clueless agent somewhere trying to help a poor "customer" who dropped their phone in the toilet, and needs to urgently to recover the number. Or are you suggesting that Google's GV backend is riskier than the carriers?