Mobile Phones

Using a mobile phone has enabled us to faster communication. If you have a smart phone, you can visit different web applications. For example: Facebook, Twitter, games and other. Advantages: fast communication, communication over the SMS ...Disadvantages: use close to the heart can cause high blood pressure. I can't imagine a life without a mobile phone. And what do you think a life would be without mobiles?  It would probably be more sociable, but still difficult, especially for teenagers.
School rules on the use of mobile phones:
*During class is forbidden to use phones. 
*On school property is prohibited to use mobile phones.

The development of Mobile Phones.

 Smartphones