[popey456963]

Calm down, personal insults aren't necessary. I have to admit I've had the same experience, don't know my phone number and don't carry it with me for the majority of the time and I've needed it twice so far. Once for a Twitter bot and once for a Telegram bot.

Never before have I been asked for a phone number that hasn't been optional from any other service (of which I have quite a few, LastPass counts about 2,200 of them).

(Of course, sometimes I do still take the optional road, two factor authentication is exceptionally nice).

[tgragnato]

Many services support otp authentication and don't require a phone number for 2fa anymore.

facebook, google, dropbox, evernote, github, gitlab, amazon, ...