As mentioned previously though, it is not mobile phones which are distracting; they are just flashing bits of metal. It is how we relate to them which makes them a distraction. Are we in control of our phone or is our phone in control of us?
"...the eye is not the fetter of sights, nor are sights the fetter of the eye. The fetter there is the desire and greed that arises from the pair of them." -Buddha, Koṭṭhika Sutta, SN 35.232