A: This earphones works with Iphone. However the volume control only works with Android devices. Not compatible with IOS or PC.

A: You may test the mic using your phone's voice recorder. Call quality may also affected by phone's signal.

A: Please check if your device is single jack. Usually single jack device will have an icon of headphone with mic. If your device have two audio jack separately for mic and audio, you will need a dual jack adapter to use mic.