Hypertension (HTN) as well as type 2 diabetes (T2D) is considered as two of the leading medical and public health problems in the world. Despite several interventions, both these diseases are on the rise in Bangladesh, which is characterized by socio-cultural differences and limited access to latest technology. Literature survey revealed gaps including lack of a mobile based HTN and T2D control framework as well as service for developing countries and lack of instant peer support. In addition to this, simple SMS reminder service is not very effective. In this paper we have tried to answer the two research questions (1) how to develop a framework for designing a multi-intervention service for HTN and T2D prevention & control in Bangladesh and (2) how to develop a service based on the framework. We have adopted Hevner's design science framework, social cognitive theories and persuasive technology for answering these questions. The result of this study includes the development of a mobile phone based multi-intervention framework as well as service for HTN and T2D prevention/control in developing countries especially Bangladesh.