xm2 works with taiwan. no issue at all.Only use 2.4 GHz wifi, and use Mainland China for the app location.
Press and hold the Power + rear button together until you get a BEEP! so that you can try to link it up again.
remember, ONLY use Mainland China as the location for the app! it's hidden in the Android version, and for iOS, i removed the app and reinstalled so that it would ask me again.


