Nowadays people overuse the technology, in this case (we speak about) "phubbing" that means a bad use of the technology while you should be talking with your friends or the family.

In my opinion, people should not use the mobile phone when they are in company, because it is an impolite behavior. Also phubbing affects your culture, friendships

On the other hand we can use phones when there is an emergency, for example if you have to call the ambulance.