I have a desktop VP set as Desktop and Tablet.

When logging in with a Samsung Galaxy Tab S (10.5") 4G 16GB (SM-T805Y) it says there is NO Visual Perspective set up.
Android ver. 4.4.2.
It is not recognised as a tablet.

Rennur,
This has been discussed before and in some cases Aware IM doesn´t recognize device correctly. This should ideally of course be fixed if possible but in the meantime, if it´s critical, you can probably hammer up a solution on your own using js/css mediaqueries and this tip:
https://www.awareim.com/forum/d/7712>

You can also force the platform by specifying the mobilePlatform parameter in the URL (with the values Tablet and Phone)