Android: If you've used Facebook Messenger for a long time, you might remember the glory days when it could handle your SMS messages, too. For some reason, Facebook took this feature away, but it's back in the latest Messenger beta. As spotted by Android Police, the new SMS support in Messenger is tucked away in your system-level settings. You can't enable the feature within the app itself. Instead, you have to go to Settings > Apps > Advanced (by clicking the gear icon) > SMS where you can choose your default SMS app. Set this to Messenger and your texting threads will then appear within Facebook's app.
It's unclear if Facebook intends to change this when (if?) it ever goes live in the regular version of the app. In the meantime, if you want to try it out, you can sign up for the Messenger beta here.