This dynamic list will give you 10 of the most popular and best selling mobile phones available at the moment. We used Google data, along with other sources, to estimate the popularity of the smartphones. In the mobile phone industry most popular isn't always "best". What is the most popular phone? iPhone 6 is the most popular phone in the U.S. Apple sold 74.5 million iPhones (iPhone 6 and 6 Plus) during the last three months of 2014.