As an instant messaging application accessed through smartphones, WhatsApp is currently used by millions of people across the world to share information in various formats such as audio, photos, videos and text. The higher education is one of the sectors where the hype of WhatsApp has been acknowledged and consequently, students and lecturers continue to embrace this technology. Using the decomposed theory of planned behaviour model, the study investigated the use of WhatsApp technology by information and communication technology students and land management students at Mzuzu University in Malawi. In order to collect both, qualitative and quantitative data, researchers used a questionnaire with predominantly closed ended questions and semi structured interviews. Findings showed that 51 (92.7%) students own smartphones and the majority use WhatsApp to accomplish various academic activities including sharing academic information, communicating with fellow students and lecturers, and conducting collaborative learning activities. According to the study, the benefits associated with WhatsApp use by students included instant sharing of information, academic collaboration, and ability to learn beyond classroom hours. Challenges include costs of ICT gadgets, frequent electricity outages and unreliable Internet connection from mobile network service providers. The study recommends that Mzuzu University should improve Internet bandwidths and install more Wi-Fi access points across the campus. The study recommends further that mobile network service providers in Malawi should offer special or competitive smartphones prices to students in addition to improving their network signal.