[Samsung Galaxy A8 (2018) Themes, Apps and Mods] mindlery:
The app is setedit and you'll need to hand over almost $3 Canadian if you want these tweaks. 1 of them will work for sure without needing to enforce but I think it's a sweet deal and 3 of these are working on Pie. 2 of them, or even 1 is worth the price.

You'll need to go into a shell and enter exactly:

pm grant by4a.setedit22 android.permission.WRITE_SECURE_SETTINGS

Copy and paste it. If you don't know how to do that just look up ADB, android developer options, and Samsung USB drivers.

First the freebie. Go into Secure Table and click +add new setting (your first entry may ask you to grant a permission. DO IT)! enter: clock_seconds value: 1 BOOM! Hope you like it because it'll NEVER go away! Just kidding. If you factory reset... or simply enter a value of 0 you'll be rid of the ticker.

Next up I think is a freebie, too. Still in Secure Table, scroll down to sysui_qs_tiles delete everything. NO DON'T! Carefully, without erasing the entire list, add in MobileData exactly like that. So actually it'll be a comma first. Have a look around for other tiles because 'ol Sammy likes to keep things real tight with the carriers. You can also remove some but I think it's best to not potentially freezing your phone up.

Now, pretty sure these ones will need the guardian to stick so if you can manage 3 bucks it'll be worth it, especially the last 2!

Change tile rows and columns.

Right above the tile edit in Secure Table is sysui_qqs_count I like a value of 7. Don't go too small or too high. Or do it and see what happens. Please don't. I can only vouch for 7 and 8. I have heard of 3 but never tried it. This changes the first row, first pull on notification menu.

Now to change the rows, the long pull I guess you can call it, qs_tile_row in Secure Table still. I do 4. I heard if you enter in 50 you get a widescreen TV. No idea. I only tried 4.

Screen Timeout not long enough?

While some of you may not need it, I need more than 10 minutes. Head to System Table and... not sure why, but I think this needs both screen_off_timeout_rollback AND screen_off_timeout to work. I set mine to 1800000 (yes 5 zeroes) to get 30 minutes. Do it on both. Double that, 3600000 will give you an hour. So if you want 13 minutes and 27 seconds, figure it out. I think entering a value of 1 will get you a free trip to the ODIN app. Don't know what that is? You'll find out pretty quick if you screw this one up. Of course you're gonna head to the menu and look to see a new entry of 18 minutes and 55 seconds. Not happening. What you will see is that no selection is made. DON'T TOUCH IT! Just leave it alone. It's working. This one works in Pie. Only one setting is needed. Can't remember but you'll find it.

These 2 are the bestest and they work in Pie.

Goodbye HIGH BRIGHTNESS and HEADPHONE VOLUME warning!

In Global System set audio_safe_volume_state to a value of 2. "But mine's already at 2." So then you've been warned. Now add it to the guardian.

In System Table, you'll want to alter a value of 1 in the shown_max_brightness_dialog "But I don't have that entry." So close the app, crank up the brightness and be told how evil it is. Wasn't that fun? Now fix up the entry. Add it to the guardian with the 1 value and if set to 0 don't forget to change to 1

*NOTE* most of these values take about 15-45 seconds to kick in after every reboot. So, before you reboot and say it doesn't work, well, you're kinda right. But you'll soon forget about it and one day be able to reboot without seeing if it works or not. Finally, one day, you'll go to turn up the brightness, or volume, and that warning will not appear. And THAT'S when the real joy is felt. As you're cranking up that slider, in all of .02876 seconds, you're going to think, "Stupid warning" "OMG I am not gonna get a warning" "Hey cool I didn't get the warning. Anyone see that?"

Bonus Feature! When bored I random;y change values of random entries. See how fast you can screw yours up! Don't play with anything unless it's your friend's phone. We're not friends.

I can't vouch this works on any other device except A8. It's a representation of what's on your phone. Adding a custom ROM will change the output and results. Use your noggin, yo

Finally, I turned off battery optimization for the app and feature pack, and turned off notifications. It works fine. No usage pops up because it's very small and no problems with enforcing the edits. No annoying notification required.