The document discusses using different survey methods like SMS, IVRS, application-based, and automated voice response for conducting surveys across generations in India. It notes that SMS surveys allow for anytime, anywhere surveys with quick turnaround but have limitations like size constraints. Application-based surveys address some SMS limitations but have software and hardware compatibility issues. Automated voice response surveys are effective for screeners, short surveys, and open-ended questions, keeping respondents engaged. The document advocates using a combination of both online and offline methods like government kiosks, WAP, and mobile clinics to conduct surveys in developing nations.