[Samsung Galaxy J3 (2016) ROMs, Kernels, Recoveries] moonlight84:
Hi there. Glad someone is still working to make these old devices. My J3 2016 J320FN is still in use for just casual usage or answering phone calls or taking photos. The screen still works ok, yada yada...

Story short... My device was always running low of free space, even removing unused/big apps... it is still hungry.

Youtube app recently showed "go to youtube.com message" "use your browse" but it's not the same thing.

In past, I tried some ROMs and I was suing one in 2018 until the FRP LOCK came and I had to revert to stock 5.1.1 ROM to never touch another ROM again.

I was searching for recent custom ROM and I found Icecyk's post and what seemed to be his ROM but he pointed to this thread.

Today I finally did it. Checked if the essential contacts were in SIM card. Enabled the OEM Unlock, I flashed TWRP 3.1.1 (with Odin 3.14.1), for some reason Wiping Dalvik/system/data/cache didn't wipe Whatsapp etc folders...

Then I installed the unofficial Lineage 14.1 ROM found on post #2.842.

It took some time to boot aas expected, I entered the SIM PIN.

For some reason, it doesn't "open" the first wizard right away... until I tapped the application drawer button.

My first complain is the excess of white backgrounds everywhere. The device itself uses AMOLED and if I'm correct, if it has lots of white/bright colors, more power it has to eat. We can all see that if we go to the battery. First thing we see is that the screen eats lots of power even setting to middle brightness.

My question is... Is there a way to make everything look black? I mean, white text with black background... on settings app, notifications, contacts, phone, etc..

I tried to install substractum, it did install but ppearently I don't have (yet) access to root so substractum can implement the changes. I used substractum before when I ran Custom ROM such as Ressurrection Remix and it worked fine as far as I remember.

I do not want to get stuck with white backgrounds. Not only will eat the battery, it will also the phone get hot.

When I was running the Stock ROM until this morning, the phone had installed a pleasent dark theme except some things like notifications and some phone app options were white. The theme itself came from the Samsung's theme store.

I do wish a dark theme...

Anyways, thanks for the ROM.

EDIT:

- I still think maybe introducing a light/dark choice when phone finishes booting up the first time.

- I been trying some apps... substractum... it's known by custom themes.

- Installed substractum legacy using APKPURE (replacement for play store).

- Substractum requires rooting and correct if I am wrong, this custom ROM from this page above does not provide a way to allow root.

- I tried busybox, supersu, and MAGISK19.something was used and flashed same way the ROM was thouugh TWRP. MAGISK does allow root access but it's kinda dumb not allowing more time to spot the root prompts. MAGISK was also updated from 19.x to 26.3 (app and binaries) and timeout increased to 60 seconds.

- busybox and supersu was removed

- substractum was finally able to run happily but when we select a dark theme from its store (second icon from the right at top right), it can't find google's play store. I had to manually search for the name of the theme from APKPURE. I downloaded J Dark Ice. Substractum picked it up and applied the theme.

- Sadly I couldn't seem to find Modern UI theme. I liked that theme.

- It's almost what need. Dark theme with white text BUT some menu text (3 dots popup menu) is kinda red-kinda text.

- For starts, J DARK ICE will be used.

- I installed rootless pixel launcher and set it to dark mode (which is still kinda grey

- Regarding to the battery, even setting to battery saving, the battery drained 100% to 86% over night. I did notice that some apps were running in background when I pressed the button at bottom left of j3 2016.

- The report of apps wasting battery was phone idle and phone inactivity.

- So far, I kinda like this ROM. More apps will be added like Whatsapp.

- One mystery still remains: why twrp's wipe option didn't really delete /data partition. Before installing the ROM, I went to WIPE, selected custom, selected DALVIK, SYSTEM, DATA, CACHE. Then I went to select the ROM via INSTALL, I could see the Whatsapp folder was still there. I did not try factory reset from within Lineage OS' settings.