Facebook messenger is very slow as compared to other chatting applications that we have. I don’t know but I get very late notifications I mean the messages that my friends send me. It lags alot and its user friendly at all. Simply boring to use the features are not good and it’s not even made good. I mean the way they have prepared is not a good looking application so I didn’t find it good to use. I will suggest the Facebook messenger team to please make some changes in your application so it looks better and people should like to use it.