My dad can now communicate with me via Facebook Messenger if he so wishes. That's because Facebook announced last Wednesday that you no longer need an active Facebook account to use Messenger. I am serious when I say (repeatedly) that Facebook is out for world denomination and this move further proves my point.
"Now, when people in the United States, Canada and Venezuela who don't have Facebook accounts download Messenger, they will see a new "not on Facebook?" option on the sign-up screen, which allows them to create an account for the app using their name and phone number.
All of the same Messenger features, including payments and stickers as well as voice and video calls, will be available to people using Messenger without Facebook. The main difference for non-Facebook users, of course, will be features that rely on your network of Facebook friends. Without a connection to a Facebook account, for example, the app will rely solely on your phone's contacts to find friends on the service. Non-Facebook users also won't be able to access messages on the web, since those still live on Facebook.com for now."
Post by Allie Nute