This study investigates key factors shaping consumer acceptance of refurbished smartphones as a means to promote sustainable consumption and reduce electronic waste. Drawing on environmental psychology and trust theory, it examines the effects of environmental awareness, environmental concern, and social influence on consumer preference and purchase intention, while assessing the moderating roles of trust in products and retailers and the mediating role of preference. Survey data from 824 Vietnamese consumers were analyzed using structural equation modeling. The findings highlight environmental concern as the strongest driver of preference, with trust enhancing several relationships. The study offers practical insights for marketers and extends sustainability research in emerging markets.