zlacker

>>nickru+(OP)
Hope they fire the person that forced verified phone numbers on new accounts.

>>grpt+a2
Verifying phone number is one of the last things which is still effective when fighting against bot registrations. Alternative is to ask money for registration.

Here is idea for hacker news crowd: make service which is a proxy for phone number validation: user needs to validate his phone number once in that app and any other 3rd-party service can ask this app for security code which confirms phone number ownership. We use something similar by offloading phone number confirmation via Telegram bot. Also this proxy service could optionally offload management of "bad" phone numbers used by spammers and add other protections

>>maline+Ib
Nice idea, I hope somebody builds it. Signal just showed that they're spending $6 mil/year for verifying phone numbers.

>>zone41+6f
That's why we offloaded phone validation to Telegram - it is too costly to send SMS in other countries than our home market and spammers are finding ways to get phone numbers for free from different VoIP providers. We need to implement complicated SMS sending limit logic to avoid abuse