Are mobile phones useful for children?

Mobile phones are a means to connect. Today everyone has at least one mobile phone to keep in touch with friends and family members and to use for emergencies. [it haven’t mobile phone make far from the technology.]? People are busy on their mobile phones and don’t have time to visit each other, so they just visit together online. Mobile phones help to us communicate and connect us to the world. Mobile phones help to improve knowledge and information technology although we devote our most of time to it and become addicted.
One of disadvantage use of mobile phones is that people haven’t got enough time to do work and study because they devote all their time to their phone. and it’s addicted. They can be upset if their phone is taken away because their mobile phone has became part of their life.
In this term that you spent time with your phone, you don’t learn necessary life skills. You spend  all of your speaking time on your phone, in your room. We don't communicate directly with others because they are also on their mobile phone. We must teach our teenagers that a mobile phone is a means to aid in emergency situations, having the ability to call an emergency service in case of accident, or a towing service in case of a tire blowout while driving. Many new phones also include GPS location technology, allowing parents to pinpoint the location of their children or to locate a lost phone.

-I couldn't understand the sentence in bracket, so i couldn't suggest a correction, sorry.

-As a general thing, you need to use plurals when you refer to nouns as a general class of things: phones, parents, tennagers, emergencies, etc.