Manpower Demonstration Research Corporation (MDRC) and its contractors, Baltelle Centers for Public Heaith Research and Evaluation (CPHRE) and Decision Information Resources (DIR) are in the final stages of conducting a 12-month post random assignment survey to Assess Retention and Credential Achievement Impacts of Community College Students for the Opening Doors Demonstration Project. The Opening Doors Demonstration Project is a major initiative designed to address two troublesome problems of low income students: their high drop out rates and the length of one it often takes them to complete community college programs. A diverse set of innovative strategies designed to promote retention and decrease program completion time was implemented in seven community colleges in five cities nationwide. The study design involves a mixed-mode CATI/Cell-CATI data collection approach. Integral to our approach is the ability to accommodate subjects who do not have telephones by equipping our field staff with cellular telephones. This approach maximizes the number of interviews conducted via CATI, thus optimizing data quality while still attending to the In-person needs of subjects. During data collection, hurricanes Katrina and Rita hit the southern U.S. Darroge resulting from these hurricanes caused our New Orleans cohort to be relocated across the country. Critical to our success in relocating and then maintaining contact with these subjects was cellular phone technology. It contributed 1o our ability to locate and interview a young population who rely heavily on cell phones, and was magnified during these natural disasters. A total of 4,341 Opening Door surveys have been completed to date for a current response rote of 75%. An additional 350 surveys has been completed with our displaced New Orleans cohort with o current response rate of 71%. Additional results by mode will be presented with a summary of the impact of the cellular technology.