Internet access tops the list of functions smartphone users could not live without, cited by 20.8% of respondents to a Prosper Mobile Insights surveyPlease login or create an account in order to access this content. released in February 2012. In fact, smartphone users said that internet access was more indispensable than calling (19.9%) and texting (18.2%). After those three leading functions, there was a large dropoff to the next most indispensable functions, email (8.2%), GPS/maps (5.5%), Facebook (3.1%), and apps (general – 2.7%). 1.3% of respondents said that games, Google, and music were their single most important smartphone functions.