Most of Android device support BS80 well, while we found bit of device (e.g.SONY D5833, MEIZU M463C) running on certain version of Android OS can't activate soft keyboard normally after creating connection with BS80 in bluetooth mode.

     To resolve it, please install the .apk attached

  http://res.newland-id.com/misc/tools/keyboardsetting.apk

      After the installation is done, just "enable keyboard" and you'll see the soft keyboard come back.