The consumer financial services market has seen the increasing use and proliferation of mobile technology to access financial services and manage personal finances. The Consumer Financial Protection Bureau's Office of Financial Empowerment issued a Request for Information (RFI) to find out more about mobile financial services and how low-income and economically vulnerable consumers are using them. This book provides a description of mobile financial services, a discussion of the opportunities and risks, and key takeaways from the comments. Furthermore, this book considers the ability of mobile financial services to increase financial inclusion among the underserved by providing them access to the banking system, retaining them in safe and sustainable account relationships, and fostering financial empowerment to improve financial stability and fulfill financial goals.