Re:Twitter forces all new users to enter a valid phone number
by xur17 on Monday March 25, 2019 @10:53PM
(#19488896)
It used to happen for me on Telegram (I think it's been fixed within the last year though), and recently a startup (Mealplan) blocked it because it's a "voip" number. I even tried emailing and explaining, but they just said they don't support it.
It usually gives no specific information about why it failed, but then I use my main mobile number and it works fine.