CELL PHONE ETIQUETTE-Do u think that there are some etiqettes to use mobile?  

yes u are absolutely right here is my three rules:
never use mobile
1) in mosque
2) while driving
3) while in classrooom

Many times I have seen people talking endlessly over cellphones at offices, banks during working hours, concert venues, cinema theatres, hospitals, even while driving vehicles. The last-mentioned, in spite of even strict rules by traffic depts. People by and large have this bad and nasty habit of talking over the phones endlessly - necessary, urgent or otherwise. I have seen many employees in offices using cellphones in office hours like anything.