To strengthen equity focus of Social and Behaviour Change programmes, an in-depth understanding of the local communication sources, channels and methods that the scheduled caste (SC) and scheduled tribe (ST) communities use is required. The purpose was to find out the local communication systems and practices, communication opportunities and resources available, process of information flow and the most credible spokespersons in diverse socio-cultural-ethnic Scheduled Caste and Scheduled Tribe communities. The knowledge generated from this study is meant to strengthen the equity focus of key social and behaviour change strategies developed by the UNICEF, government and other bilateral organizations as per their relevance to various issues being communicated by the C4D program. For this study, the desk research was conducted thoroughly to select the most deprived SC/ST communities in media dark areas of 5 states. 18 SC/ST groups were selected across the five states to study.