NurPhoto/Getty Images Many Americans spend hours a day on their phones and struggle to cut back. George Mack, a newsletter writer and marketing executive, said having two phones helped him fix his phone addiction. He said one phone inspires serotonin, while the phone with social media apps is all dopamine. Many Americans who spend too much time on their smartphone romanticize about getting rid of it altogether and returning to the days of flip phones and T9 predictive text.