I've bought a 123+ through the Australian shop. I've spent all day trying to install it into my 76 type 4 kombi. I've followed the instructions exactly but cannot get any light to show at all, and the app won't locate the device either. (Sony xperia xz2 running Android 8) I attempted the reset as per your other forum post but could not see any blue led come on either. Is there any way to test if the device is even working at all. I've also deleted and reinstalled the app.
OK, forget this, it turned out to be a bad earth, seems to have worked now and accepted the modifications to the curves, although the app is still a bit glithcy and closes and reopens often.
