V-ENABLE's voice search technology offers mobile phone users the ability to find people and services quickly, via voice or text commands. It also offers mobile operators a way to save money on 411 services by automating the interaction. V-ENABLE approached Method for help designing the phone interface for the service: a way for users to understand the input and output rules for this new type of interaction, allowing either voice or text input and offering both voice and text responses to user queries. Method worked with V-ENABLE to understand the system's capabilities, mapping user paths for different possible interactions. We then created clear screen layouts and information cues to lead users through the different states and possibilities. Among the innovative answers to the challenge was a "voice/text field" - a way to help users understand that input could be either typed or spoken at that screen. A round of tests with target users verified the system's usability, and a visual design cued around V-ENABLE's existing mark provided a simple and sophisticated look and feel. At the end of the work, V-ENABLE had a simple, clear, and attractive product to bring to mobile carriers - one that highlighted the system's advantages and differentiated it against competing voice search systems.