Is there a term for the people who walk around with their phones in their hand?
Nomophobe derived from "nomophobia"
https://en.wikipedia.org/wiki/Nomophobia "Nomophobia is the fear of being out of mobile phone contact".
phubber (urban-dictionary)
The combination of the words, "phone" and "snubber" which means people who lower their heads looking at their smart phones.
https://en.wikipedia.org/wiki/Phubbing
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