Ok. Facebook it very good app. Which connecting people from any where to any place it is an social app which is used by millions of peoples because its connets with our frnds relative and stranger which may be yours future frnds but there are serverl limitations like it get lots of data usage and occupy lots of space in Ram which cause slow down mobile phone perfromance and one security reason that if I make an account with my number and that number may be off that number and froget my passwor then there is no way to gain my account becoz there is only way is that my number which is off . And other wise it gave us as good kind of tools we can use as like we use as in our computer but this app. Can fully used as like computer by which lost of time wasting to get the probelms solution