It seems that Facebook will be introducing a major update on its messenger. Facebook will introduce SMS integration and Multiple Account Support on it Facebook Messenger. Facebook has started experimenting with these features, however, they are up till now limited to Android users.Very recently, Facebook-owned-Instagram has also introduced similar feature.
After multiple account, the second best feature is SMS integration. Facebook has also introduced this feature before in 2012 but it has removed it by 2013. According to company, not many users followed this feature, due to which it was removed by the Facebook.
While giving an official comment regarding multiple account facility, the company Executive said that many people share their phones with their family. So for shared devices this feature is again introduced by the company.