12.Does the BTR3K support in-line remote and the microphone function？
The BTR3K supports the CTIA standard for line control as well as line microphone. But the headsets with OMTP protocol only support normal listening.
Android-based cellphones can normally use WeChat,Wechat calls, QQ voice and QQ calls.
The phone microphone is used when taking videos, using QQ voices and Wechat voice. It depends on different systems of mobile phones.
iOS system only supports WeChat voice, calls and QQ calls with the microphone of BTR3K. If taking a video, the phone mircophone is used.