Hi, I have samsung A9 tablet, too. 8" compact size. Today I bought a TypeC rechargeable universal stylus pen at average quality and feature, I only expect it to work as a finger, not having ultra drawing specifications . And I tested on my samsung note lite 10 phone and it worked well as a high sensitive finger as it's own Spen quality, After I tried it on A9 tablet and it failed. First when I tilt it tab respond some movements. After I watched youtube videos, I tried to make the tablet recognize the pen by touching every where , it was silly, but I tried my chance. It worked at some angels but not properly, after I install an app from Google play to make the pen connect to tab. Some brand's own pen setup app,I was just trying to heck the tab, It said connect your pen to tab by cable, and i made the connection by typeC cable one end in pen's charge socket, the other end in tab's, . App didn't respond for further settings of course and I closed it, but tab responded well. Now when I connect the pen to Samsung A9 tab by TypeC cable it works as the way it should be, as a perfect finger, same performance as on the phone. 😁 when I disconnect the cables, it sometimes works sometimes just with a tilt. So the question is, what's the difference between tablet and phone touching settings? Pen works well as an alternate finger on phone, on tablet only by cable connection, in short problem is not on hardware part it is on software part, some settings or adjustments or disable/ enable issue. Let's find out!!! And if there is a solution already all around, please let me know,
