To be honest, listening to radio in HD consumes a lot of data. Therefore, always check whether your radio is listening via WiFi or 4G. We always advise, especially if you don't have an unlimited data plan, to listen in HD over WiFi. Then your connection is also a lot more stable. What is that in MBs? HD Audio consumes about 150 MB per hour. Without HD this will be around 30 to 40 MB.