Turn off High Quality Music Streaming Over Data Connection to Save Your Data Bytes
During the run-up to the Apple Music launch, we weren’t completely sure at what bit-rate the tunes would stream at. It was eventually revealed that it would be 256kbps AAC, the same as iTunes downloads, but there was still some confusion over whether this would vary depending on your mobile connection.
iOS 9 though lets you ensure everything you stream from Apple Music comes down at the highest resolution available (still, 256kbps) whatever strength your connection is. To enable it, open up Settings > Music > Mobile Data underneath of streaming, toggle the High Quality over Mobile Network option.