Interesting article on smartphone addition [bloomberg.com], written by a 45-year-old who suffered from it.
I can sympathize. I went through a massively stressful period a couple of years ago, which involved being on-call for a project basically 24/7. Continuous status notifications and emails. This got me into the habit of leaving those notifications on, and every time any sort of message arrived, I'd check the phone, which would lead to using the phone, even if the message itself was unimportant.
The continuous flood of interruptions makes you feel needed, important, connected, or whatever. It also destroys your ability to concentrate (when working), or to participate in your family's life (when at home). Turning off all notifications was a very, very good thing...