The first one.......

Continuation of 1st Para
One of the best features of Twitter is, when we are not able to use Twitter because of reasons such as no internet connection or without computer and so on means, then by this time Twitter provides us a nice way to stay in connection with our friends using our mobile phone. Yes, we can stay in connection with our friends using our cell phone and can check our Twitter messages from the mobile phone itself. Thus, there is no need to worry about net connection, computer and all. So there are no constraints to use Twitter and this is one of the reasons why Twitter becomes very popular.
Continued later...