Read Message Without Opening Any Message

1.When any massage come in your mobile then don't open it. 
2. go into inbox. You will see that massage as unread i.e. U will see envelop symbol.
3. then go to option and select forward, you will see all massage. Don't forward it. Then select exit and you will see the envelop symbol i.e. Unreaded massage as it is. By this you can read massages of friends mobile without knowing him.

Thanks To Satyam