What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Blackberry Curve, Bold, Storm, Torch, Pearl

It is a modern age of communication and the mobiles are the reason for making the connectivity easy between the people irrespective of the distances. It doesn’t matter how far are you from home you can talk to your parents, children any time when you desire just by dialing a number and pressing a single button.