This research aimed at: (1) measuring farmers' willingness to use mobile-based extension; (2) identifying the type of information that farmers need by using mobile-based extension; (3) examining the effect of the studied determinants on farmers' willingness to use mobile-based extension. The study was conducted on a sample of 291 farmers randomly selected from three villages in Assiut Governorate. Data were collected using questionnaire forms during May and June 2022. Frequencies, percentages, arithmetic mean, and multiple regression analysis were used for data presentation and analysis. The results showed a high willingness of the respondents to use mobile-based extension. It also came to clear that they need to receive information by mobile phones about good agricultural practices, weather and marketing information. It cleared up that the six determinants of the studied model significantly explain 48% of the variance in farmers' willingness to use mobile-based extension. Based on the research findings, some recommendations were drawn for mobile-based extension providers to increase the success chances of the existing and future initiatives.