Techopedia explains Nomophobia
Nomophobia primarily is a fear exhibited in human being when their cell phone is unable to perform the most basic of communication functionality that it is designed to provide. This behavior is triggered when for any operational, technical or even general reason the mobile phone is inactive such as lack of network signal, low reception, empty battery, finished credit or forgetting the cell phone at home or office.
Nomophobia is clearly visible in all those individuals that use their cell phone to communicate and keep in touch with their employees, colleagues, friend and family.