Good sides:
1. Easy way to be in touch with friends and family if you live far from home
2. Fast way to find information in short time
3. Good way to save necessary information and always have it with you
4.Also you take pictures very fast and easy and share it with everybody
5.There are a lot of good functions in phone like: alarm clock, calculator, social networks ect
Bad sides:
1. Phone can be reasons of bad health if you sleep near it, if you hold it too close to face and ect
2. You can have dependence of phone, of games, of internet
3. Phones can disturb process of studying at school
4. It can take a lot of money if you speak a lot
5. Repair your phone can cost a lot of money