[Samsung Galaxy Tab A series ROMs, Kernels, Recover] K9100ii:
I'm afraid not.

When thinking about trying to get a build up for the LTE variant initially, I underestimated the complications in doing so and misjudged the whole process. Adding all of the stuff for mobile networking functionality and the different GPS hardware in the LTE variants (T585s and P585s) to my existing sources actually seems to be quite involved, and getting it all to work properly to provide the mobile networking and GPS functionality would be more difficult than I ever thought.

I also thought I could take and adapt the stuff for the modem and GPS hardware from Valeras (the previous maintainer working on stuff for these devices) old device tree for the LTE variant to my device tree, but after looking through it all and thinking in more depth about it, I realized that isn't easily possible. My current sources for the WiFi-only variants have had too many changes applied to them to simply do that, and I wouldn't want to take much from it since it really isn't in very good shape. Along with that, I wanted much newer proprietary blobs from some newer version of Samsung's stock firmware for some device than were used before, and this has its own complexities since I couldn't be certain if any I extract would work on these specific tablets with their specific hardware, and about what I'd need to do with them to get them to work if that's at all possible.

On top of all that, if I was to go through with trying, and it didn't all go really well, I'd probably understandably lose patience from testers from the likely many things I'd need to try to get it all working, and it would all take an unbearably long amount of time, and in the end, I would no doubt not end up with anything that works from all of that.

The only real way to go forward with it would be to get an LTE variant device myself, and use it to bring things up. A short while ago, I looked on eBay UK for the few listings for one. At the start of my search, I saw a few listings for the LTE variant that were decent. Naturally, they got bought up and vanished really quickly, much too quickly for me. Afterwards, I couldn't find any other decent listings for a long time, so I gave up for then. I'm probably going to look again in the future, and hopefully buy one, especially as I still want another one of these tablets.

I'm also finding that time is becoming more and more scarce for me, and I don't have as much interest or motivation as I used to with this Android stuff, especially as I'm now content with the state of things for the WiFi-only variants, and I'm now shifting more to other interests. That has had an effect as well.

So, finally, in short, the complexities and likely chance of failure due to such complexities without having direct access to an LTE variant device make it seem to not be truly worth attempting to get working sources up for the LTE variants, and make builds. Realistically, I'd need direct access to the LTE variant, and I may acquire one sometime in the future. In the meantime, sadly, I won't have anything for them, and the builds for the WiFi-only variants will continue to be the only available option.

You're very welcome, and hmm, alright.

That problem has been reported a few times before.

To fix it (in one way that's preferable), I'd need to apply changes to the kernel (more specifically, the touchscreen and wacom drivers in it) like the changes in this commit: https://github.com/LineageOS/android_kernel_samsung_gta4xl/commit/8f0b9dedfad0f52279f91ff2a69ca61fc5227066

I haven't gotten around to trying to adapt those changes yet to the drivers used for the P580. Not sure about it at the moment, but I'll try later. If I get anything, I'll send you an installable package with a new kernel (rather than a whole new build) in a PM for you to test out and see if that problem no longer exists.

It seems quite shady. It's just a build and nothing more, and there's probably nothing about it elsewhere. There's no information about that build, such as the sources that were used to build it, or any details about the state of it.

I'd suggest against trying to use it.