Government authorities expect companies to have appropriate controls over communications by text and messaging app. In recent years, U.S. regulators have imposed billions of dollars in penalties on financial services firms for failing to maintain records of electronic communications in accordance with the federal securities laws. This article, synthesizing insights offered by Miller & Chevalier attorneys during a PLI program, reviews regulators’ expectations around companies’ management of mobile device communications and offers instructions on how companies can craft and implement effective mobile device policies. See “Effective and Compliant Employee Monitoring (Part One of Two)” (May 30, 2018), and Part Two (Jun. 13, 2018).