In this contemporary era, everyone has a mobile phone. A number of adolescents have their own personal smartphones. It provides immense knowledge to youngsters. But, spending a large amount of time using smartphones can lead to health problems. This writer will discuss its advantages and disadvantages in the following paragraphs. firstly , in the era of technology, everyone has a smartphone. It has many advantages such as teenagers can learn many things regarding their studies. They can get deeper knowledge about any particular topic in an easy way. Secondly, they can learn many languages through the internet. For example , most children play online games such as games interstate in which kids communicate with other players from other countries. It helps them to improve their communication skills. On the other hand, there are some disadvantages such as students spending lots of their time playing games instead of studying. Then their performance in studies degrades. Moreover, they...