Boon :
1. The smartphone are useful for easy communication .
2. You can access information from the internet quickly without the need to start pc.

Bane :
1. The use of it for long time can affect eyesight.
2. Playing games in it for hours affects our brain and make it lazy .
3. children playing too much games live in fiction world rather than the realistic world , they always dream that they would be the hero of the game,etc..