In this modern world Smartphones are the most essential part of life. As per the invention done back in 1992, for almost 2 decades from now i.e., 2020 the smartphone usage has rapidly increased which may be around 2.5 million and is still increasing. In today's world, there are many manufacturers of cellular phones which look keenly into an individual need and satisfaction for developing various types. The writer focuses in for and against the cell phone usage over the human thinking capability and dependency.