This study aims to determine the factors that influence purchasing decisions (Y), including: (X1) product quality, (X2) price, (X3) promotion and (X4) environmental. This study uses data collection methods by distributing questionnaires to 100 consumers of Xiaomi smartphone users in Makassar. Partial test results in this study indicate that: (X1) product quality has a positive and significant effect on purchasing decisions, (X2) price has a positive and significant effect on purchasing decisions, (X3) promotion has a negative and insignificant effect on purchasing decisions, (X4 ) environmental has a negative and not significant effect on purchasing decisions. Whereas the simultaneous
test results, product quality, price, promotion and nvironmental together have a significant influence on purchasing decisions. On product quality and price so that the
company can maintain it in order to attract even more consumers.