Pardon my french but I kinda dont care what you need. When I see headlines "ban phones", I think to myself "surely not", and look for more information in HN comments first. I couldnt find any info supporting/refuting this, so I had to actually go to the article and read it: something I am glad if I can avoid.
If someone else would posted information in my comment before me, he would save me time and I would upvote his post.
If someone else would posted information in my comment before me, he would save me time and I would upvote his post.