<![CDATA[Aims of this study to analize quality of product, service, and promotion on decisions of purchasing for Oppo smartphones at the Singosaren Surakarta Mobile Exchange. Study’s design used a quantitative descriptive design. The population was consumers who make purchases at the Singosaren Surakarta Mobile Exchange and the sample used was 100 people who are calculated using the unknown population formula and took by purposive sampling. Linear regression test, t test, and the coefficient of determination were used to analize the data. The results were quality of product had effect significantly on purchasing decisions positively, service had effect significantly on purchasing decisions positively, and promotion had effect significantly on purchasing decisions positively. Quality of product, service, and promotion influence significantly the purchasing decision of an Oppo smartphone at the Singosaren Surakarta Mobile Exchange. Good product quality, good service, and attractive promotions can increase purchasing decisions for Oppo smartphones on the Singosaren Surakarta Mobile Exchange. Keywords: quality of product, service, promotion, purchase decision]]>
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