Can you analyse the effect mobile phones have on society?

The answer to this depends greatly on the type of society
that you are talking about.  The impact of mobile phones on developed, rich societies is
much different than their impact on developing
societies.

In developed countries, mobile phones are mainly
for convenience and entertainment.  In rich countries, people use their mobiles for
playing games and taking pictures and exchanging texts with their friends.  (Of course,
there are many uses for business--people can make business calls while driving, etc.) 
There are good effects (easier communication with family members, more things to do for
fun) and bad (people are never out of touch with their offices and bosses), but the
phones may be seen by some as just a convenience.

In
developing countries, mobile phones can be much more important.  In countries without
good infrastructures, mobiles can be the only real way of communication.  In many
countries, mobiles are starting to be used the way credit cards are in rich nations;
this means there are ways to buy things using your mobile.  There, the functions of
mobile phones are much more vital than the uses of mobiles in rich countries.  In
developing countries, then, the effect of mobiles is to greatly improve people's basic
abilities to communicate and to buy things. These are things that have long been taken
for granted in the rich world.