By news@appleinsider.com (AppleInsider Staff) A vast majority of Apple’s iPhone customers stick with the platform, with the company estimated to have curated the highest brand loyalty out of any smartphone manufacturer operating in the U.S., according to a new study released this week.Source: CIRPAccording to a report from research group CIRP, Apple maintained a loyalty rate of more than 90% for the past three years. The calculation was based on the percent of customers who upgraded their existing iPhone to a new model….

Source:: Apple Insider