In my opinion ,every coin has two sides .Both of them have their advantages and disadvantages .I have some reasons as followed.
First of all ,if you want to have a long-distance communication .Writting is not only cheaper but also more expressive.Because you can think more,write more and then express yourself more.Next,everyone needs a boost from now and then.And writting can last while calling cannot.Only in this way,can people read your inspiring words more than once ,savored and treasured which will make them confident again.
On tne other hand ,making calls is much faster ,so they are more approriate when you need a quick reponse .What's more ,if you cannot make sense of other's words ,you can let him or her say once more at that moment until you follow him or her .
Therefore ,there is nothing in the world can be perfect .It may be better than other one only in some situations ,so you can choose writing or calling in accordance with the situation.
--by Beibei (B18)