Do you think mobile phones, near workspace while working, break concentration?

i think so as well

I think it's different for a lot of people, especially in regards to how they like to work. Personally, I tend to find myself being more productive working in a pattern of short bursts, with a small break in between (roughly 25 minutes 'on' and 5 minutes 'off'). This was something I learned to do during my studies, where I found myself getting restless doing long bursts of work at a time.

I think they do, I try not to use my smartphone often, but it became literally irreplaceable in my life. I can't imagine my usual living without a Tracfone and tracfone customer service which is actually very helpful. Internet and digital communication in general are extremely important today.