Social Networks are nowadays a very important way for companies to make brand communication. Because studies about this topic in Mexico are scarce it is relevant to know how User Generated Content that consumers communicate through these social platforms is related with the perception they have about brands. A quantitative study was done as part of a doctoral thesis, which had as main objective to determine the relationship there is between these three variables: User Generated Content (UGC), Brand Personality (BP), and Consumer Based Brand Equity (CBBE). Using a sample of 211 smartphone users, a Confirmatory Factor Analysis was conducted from which a Structural Equation Model was developed, finding that BP has an impact on UGC and CBBE, but UGC are not related directly to CBBE in the Mexican context of the metropolitan area of Guadalajara.