Headphones allow you to listen to music from your T-Mobile Devices device and if your T-Mobile Devices device and headphones support A2DP then you can use the same headphone for T-Mobile Devices device calls. Most common types of headphones are in-ear ear buds other there are other types as well including on-ear headphones that stay on your ear or around-ear headphones that form some sort of a suction around your ear. In addition to wired headphones there are Bluetooth headphones that are without wires.
