Mobile is an brilliant invention of science. It is one of the most facinating device given to us by science.
But the goodness or badness of it completely depends upon the user.
If the user uses it efficiently, it's obviously good for him. And if he uses it for his misusses, then it is bad.
Therefore, weather mobile phone is good or bad depends upon the user.
But it has a lot more of advantages, but it also have some disadvantages besides it.