Point is that generally speaking databases rarely delete fields once added, especially field as valuable as a phone number; as such, my assumption is Twitter ha

Point is that generally speaking databases rarely delete fields once added, especially field as valuable as a phone number; as such, my assumption is Twitter has had a field in their database for a user’s phone number since it was first released. Twitter’s been collecting phone numbers since at least late 2006: https://web.archive.org/web/20061103054924/http://twitter.com/account/join https://web.archive.org/web/20061103054924/http://twitter.co...