Seeing that Facebook-owned Instagram recently launched support for multiple accounts, it's not surprising to see the feature being extended to Facebook Messenger. Regular users will now be able to share a device with Messenger installed. However, we can't help but anticipate that the feature is directed more at business use, given that many of those working in communications have to juggle multiple accounts simultaneously.
The other major feature that Facebook is currently testing on Messenger for Android users is SMS integration. The decision comes as a mild surprise: back in 2012, Facebook rolled out SMS integration in the Messenger app, but the company removed the feature in November 2013 quoting low user adoption.