Imagine a situation that you are in a country where no one understands the language you
speak and you can not read or write. However, you have mobile phone with you.
With a mobile phone with Android, the Google translator translates the data of one
language into another language by using XMPP to transmit data. You can type the message
in English and select the language which is understood by the citizens of the country in
order to reach the message to the citizens.