Current Apple Music users who have been complaining how you get higher-quality audio over Wi-Fi than on data are going to get the upgrade they want. In the third beta of iOS 9, users are given the option to select high-quality streaming over cellular connection. It can be seen under the Music options in the Settings app.
Once iOS 9 is unveiled in the fall, users will get that option. However, there are pitfalls to a higher-quality stream, too. You use up more data and battery when you stream. And Apple even warns that playback might not be as smooth as you hope. But if you don’t mind this, then you at least have the option when the mobile operating system update comes out.
Source: Mashable