How to Adjust Music Streaming Quality on Your iPhone
By Conner Carey
Not all streaming services are created equal. With the release of Apple Music, listeners quickly realized there were no quality control options. The difference, until now, was automatic: you heard higher quality sound when streaming music over a Wi-Fi connection than when streaming across cellular data. With iOS 9, Apple is letting you decide for yourself whether better music quality is worth increasing your cellular data usage or not.