Watch: Apple rules the market with 715 million iPhones currently in use

There is a reason why expensive iPhones still rule the smartphone market and why several customers replace their old iPhones with new ones. Nine years after its launch, Apple went on to sell its billionth phone. there are 715 million iPhones phones being used the market. Apple products’ features and services are touted to be the main reasons for the success and popularity of its products.