nomophobia       
noun [ U ] uk/ˌnəʊ.məʊˈfəʊ.bi.ə/ us/ˌnoʊ.moʊˈfoʊ.bi.ə/
 无手机焦虑症,无手机恐惧症
fear or worry at the idea of being without your mobile phone or unable to use it
  Many people suffering from nomophobia never switch off their mobile phones. 许多有无手机恐惧症的人从不关掉手机。 
 - More examples
 - Nomophobia is the fear of being out of mobile phone contact. Having no bars or a discharged phone is leading to anxiety and panic attacks in an increasing number of people.
 - Nomophobia is a rising trend among high school and college students.
 - Nomophobia has been proposed by psychiatrists as a specific phobia.
 - Nomophobia may be linked to social anxiety disorder.