We should make him understand that this mobile phone is creating diffrence between me and you you should avoid using this and it is effecting your studies also and this mobile will make your future a big faliure
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If your friend is using a device that is dragging him away from his real life then by  being a good friend you can advice him about the ill effects of using a mobile phone . Then point out to him all the things he's missing . Introduce him to some other activity like playing the guitar or things he may like. By doing so you are helping your friend from falling prey to a small  box.
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