Background: Nearly 1 0% of U.5. households are now cell-phone-only, and this number continues to grow. The demographics of households one or more cell phones and no landline differ significantly from landline households; these households are more likely to be younger, rent their home, and live alone or with unrelated roommates. There is growing concern that this under coverage by landline-based random digit dial (RDD) survey research like the Behavioral Risk Factor Surveillance System (BRFS5) is threatening the generalisability, and therefore the utility, of these studies. One solution that may address this household undercoverage is to add cell phone frames to the RDD survey frame. Objective: To determine the feasibility and cost of conducting the BRFSS survey with cell-phone respondents. Methods: Beginning in October 2006, ORC Macro began calling cell phone exchanges of random within six states—MA, NJ, CT, MT, FL, and TX—and administered a shortened BRF55 or ATS (Adult Tobacco Survey) survey instrument with reduced calling attempts, and more liberal refusal protocols. Results: All relevant survey administration costs will be tracked across all six states participating in the pilot and compared with landline administration costs for similar work. Response rates and other relevant dispositions will be tracked and compared with state-level BRFSS and/or ATS response rates over the same period. Conclusions: We anticipate these data will demonstrate the feasibility of conducting the BRFSS via cell-phone, as evidenced by improved response and cooperation rates, and increased costs balanced by a shorter survey with a reduced number of call attempts.