The mobile phones
Personally, I think that people only notice the time that someone is in the phone when they are using it, but they don't notice the time they aren't on the phone. Soit looks like they use it way too much.
It is true that some people have an addicition to the mobile phones, they can't be for a long time without them without getting nervous. But they are a small case.
From my point of view, people use their phone because they need to use it for work or to talk with someone, but they can be without it for a long time and nothing would happen to them, so they aren't addicted.