The primary function of a smartphone is to communicate more effectively with one another but due to loss of control we tend to spend more time on phone, and developed the addiction of over usage.
The tendency to develop the addictive behaviors similar to that of gambling is very clearly seen in over usage of smartphones in everyday life.
These addictive tendencies might cause brain dysfunction, wellbeing, low productivity and personal life imbalance with quantifiable evidence suggesting social anxiety and loneliness which is essentially linked to over usage of smartphones.
This stress is directly associated with the 24/7 accessibility afforded by smartphones creating a never being free and guilt at the inability to respond to calls and text messages feeling. This kind of feeling is developed into mental health issues and social isolation.
Hence limit the usage of smartphones to the shortest while possible.