the case does not need to be completely closed, it only has to make an angle of 70° with the keyboard in order for the mic to record silences are known to appear on other phones with Android 9. Let see what the firmware update brings.
While I have not yet received my Cosmo, to me, that sounds like a flex cable issue between the halves of the device, mostly because, as far as I can tell, a healthy Cosmo (or Gemini) shouldn't really have any means of telling when the lid is at that angle. All the motion sensing stuff, AFAIK, sits in the upper part only, so it can't know the relative angle of the keyboard part. The Hall effect sensor, detecting when the lid closes is an all-or-nothing affair and when it triggers, the screen turns off, which I presume does not happen at those 70 degrees.
Finally, at least the Gemini, for some reason, has a proximity sensor on the right side of the screen - that's why there's a small cutout in the preinstalled screen protector. Since the Cosmo has the same cutout in the pictures I've seen, I presume it has the same sensor in the same spot. That, too, is a single bit yes-or-no sensor, which in my tests, triggers when something is a centimeter or so from the sensor. It should trigger while the lid closes, but not until the lid is very close to completely closed. When running AndroSensor (there are newer apps - it's just what I had) on my Gemini, the proximity sensor trips when there's a about the width of a finger between the halves.
A damaged or not correctly seated cable, running between the two halves might get disconnected at some particular angle. Lacking good pictures of the internals of a Cosmo, here is, for reference a (my) Gemini with the metal parts removed:
https://www.oesf.org/forum/index.php?act=at...ost&id=6065 (embedding pictures via dynamic links isn't supported here)
While I don't know if the Cosmo is built the same way, we can see in the picture, that neither connector for neither cable is immediately accessible in the Gemini. In this image of the Gemini main board (which sits in the upper half):
[img]https://c1.iggcdn.com/indiegogo-media-prod-cld/image/upload/c_limit,w_620/v1502884456/ujtdxzxhjkqosomayqr4.png\" border=\"0\" class=\"linked-image\" /]
we can see the same big square chip as in the previous picture, suggesting both pictures are taken from roughly the same angle, so the connectors we see at the top of the picture might be the flex cable connectors. If so, they might be possible to access them by removing some screws, making it possible to lift some of the plastic parts covering them in the first picture, but whether that might be helpful or harmful is anyone's guess. Both the linked images, are from the thread [a href=\'index.php?showtopic=0\']Teardown?[/a].