Almost every phone sold in America ships with the same quiet promise: flip one switch, silence the noise, get your focus back. Hundreds of millions of people use Do Not Disturb or Focus Mode every week. The feature that promised to fix your phone problemDo Not Disturb is a system-level feature designed to suppress non-essential notifications. A May 2026 Utah State University study tracked a group of students completing programming assignments with and without notification suppression enabled. The next step, researchers say, is understanding whether the person holding it is actually ready to let it be.