Mobile phones are simply NOT necessary in your life.
The phone companies may say otherwise in their glossy ad's , but to be honest - the majority of conversations held on them are about absolutely - nothing , and are merely a way of using up airtime which you would otherwise lose , if its not used within a certain time.
The old phrase - " A fool and his money are easily parted " certainly applies in this case , and the phone companies must be laughing all the way to the bank.
I have a new phrase - "Your phone is only as important as you are." Just because you don't have anything important to do in your life doesn't mean you should insinuate that the rest of us are all just cattle.