[Samsung Galaxy S5 Neo ROMs, Kernels, Recoveries, &] Zeh John:
Many many thanks for replying and teaching me some more about Android's innards.

Sure, I already knew attempting a Frankeninstallation would make a... Frankeninstallation. I was just messing around experimenting with things to see if I could find something out. And I sure did find out, unexpectedly, that following unofficial non-recommended procedures would botch things. Again, just experimenting and sharing the noob me is.

The single reason I avoid doing upgrades and nuke&pave clean installations is because I have so many configurations (and I didn't document them all...) that it will take me painful ages to get myself an acceptable system again.

That's why once everything is done I make a TWRP full backup and if I eventually break a system I restore it and update the OS (and only this on itself can be a painful experience on these old phones).

Sure, it makes all sense. Especially if I want things not to break... (whistles in almost embarrassment)

When I made the 1st dirty install of your build it was working perfectly, only after this Frankeninstallation it stopped working.

Honestly I have no clue. The phone had Android 6 when it was given to me, I installed LOS 18.1 clean on it a couple of years ago.

Back then I think I've done something on it with Samsung Kies, can't remember what after all this time.

I have absolutely no clue where my versions of those are and how to update them if needed. But the problem here just seems to be me messing around.

For what I've played with my Frankenchild, apart from the broken internet connection everything seemed to work perfectly. Didn't play with it that much, but I wouldn't be surprised if the Alarm app tried to murder me in my sleep... :D /s

So what I will try next is (after making an updated backup first) is trying again the dirty install of your build (for the reasons mentioned above and I know it's not the recommended official way). I expect, like the other times, LTE should be working but the CPU speed will be locked high and hot on an unrooted ROM. @Beta123MAX gave me a hint for easy rooting and with that I should be able to scale down the CPU speed and get everything running smooth and cool and hopefully I can have what I consider to be a proper working operating system.

PS - By the way, this might be a little OT but it's very important for me, regarding the looks of a ROM to me.

Please take absolutely no disrespect at all for your hard work, I value your build and the new and updated breath of fresh air your work brings to this old and adored device, but I personally didn't enjoy very much the look of your build. I really enjoy the greenish dark theme of the old LOS and this new one seemed a bit more monochrome black&white.

Also and especially I don't like the big "pill buttons" for the widgets (like Wifi, LTE, Bluetooth, Airplane mode, etc.), they are too large and the scrolling text on the buttons feels like an ADHD fit to me with everything jumping around everytime I pull down the menu from the top status bar (that has the battery, the time, etc.). Simple small square buttons without text are perfect to me.

In fact I believe this is the Android 12 default visual framework? Again, it's me, not your work, i guess I'm starting to feel old and a luddite without desire of things to change.

So is there a simple way to make your ROM look like LOS 18.1? Are there themes around or such? Or some simple configuration to remove the pill buttons? A simple link would be enough, I would be really really appreciated.

Again, thanks and cheers.