The purpose of this research study is to learn about the use of a cell phone for monitoring patients with heart failure. Participants will be asked questions about their heart failure daily and participants will need to answer them. The investigator will try to assess if the questions are easily understood by the participants. The investigator will also assess if the phone-based system for monitoring is easy to use by the participants. The investigator will also assess if the daily questions and interactions increase the self-efficacy, knowledge, and quality of life of participants related to their heart failure.