In the modern era, the company's marketing strategy has included the use of social media to increase product sales. For a business, social media can give both tangible and intangible benefits. The role of influencers is undeniably important in reviewing smartphones to generate significant sales profits, therefore identifying the proper influencer is a challenge for companies. Influencers in the smartphone industry are commonly selected based on several factors. This case research aims to show how the public, particularly on Twitter, is discussing the brand's smartphone products. This study aims to identify actors who play a key role in promoting smartphone products. The In-Degree, Outdegree, and Betweenness Centrality measures are used in this study to identify influencers using the Social Network Analysis approach. It was found that some influencers are also thought to have the ability to raise a brand's product awareness. There are 3 types of influencers, a real influencer who like to review smartphone product, an account that focuses on educating people about the specification of a gadget, and a person who often retweet Samsung smartphone product.