[Galaxy S 4 i9505 Original Android Development] side:
Optimized LineageOS 17.1 for the Samsung Galaxy S4 (Qualcomm variants)

Brought to you by the Jflte DevConnection Team

DISCLAIMER

* Your warranty is now void.
< Well lets face it, your warranty has been void for 3+ years now.. Samsung don't care about you. Who do? JDC TEAM. >

* We are not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed.
* Please do some research if you have any concerns about features
* included in this ROM before flashing!
* YOU are choosing to make these modifications and if
* YOU point the finger at us for messing up your device,
* WE will laugh at you.

FEATURES

Based on Official LineageOS 17.1 - Android 10_r41

Latest Security Updates integrated

Improved Speed, Stability, RAM usage & Battery drain

Powered by Buffcore Kernel - some / most / all of the following may or may not be hooked up yet.

[B][COLOR="DarkOrange"]Buffcore 10[/COLOR][/B]:
set config_hz to 300
add intelliplug
tweak our touch boost
add color control tweak
stop lowclocks from defconfig
build with gzip
quickwakeup - the kernel can semi-wakeup and decide if needs to end suspend or return to suspend with losing doze
fully optimized toolchain flags
reduced sleep timeout
dynamic file syncing - early_suspend and dyn_fsync by default
print to dmesg log when a suspend gets broken
sdfat enabled
fastcharge implemented (up to 1900 ac / 1600 usb)
bcmhd wakelocks for rx and tx halved
libmemcopy and libstring sped up
io readahead to 1024k
power efficient work queues
voltage tweaking user interface
faster vmstat
autosmp hotplugging replacement
mmc crc disabled
allow for lower cpu voltage
reduce swapiness
optimize divide / multiply by power of 2
added tcp optimization options
set westwood default
optimize cbfillrect function
reduce wifi wakelock times
nohz: reduce overhead under high-freq idling patterns

Many, many more - install and see for yourself!;)

SUPPORTED DEVICES

GT-I9505 (jfltexx)

GT-I9505G (jgedlte)

GT-i9507 (jtfddxx)

GT-i9508 (jfltezm)

SCH-I545 (jfltevzw) VERIZON USERS: since your Bootloader is locked, you must be on the VRUAMDK

SCH-I545L (jfltelra)

SCH-R970 (jflteusc)

SCH-R970C (jfltecri)

SCH-R970X (jfltecsp)

SGH-I337 (jflteatt) AT&T USERS: since your Bootloader is locked, you must be on the UCUAMDB or UCUAMDL

SGH-I337M (jftlecan)

SGH-l337Z (jfltecri)

SGH-M919 (jfltemo)

SGH-S970G (TracFone / Straight Talk)

SM-S975L (TracFone / Straight Talk)

SPH-L720 (jfltespr)

SPH-l720T (jflterefreshspr)

jfltezm - China Mobile

jfltetfnatt

jfltetfntmo

Do 'getprop ro.bootloader' in Terminal Emulator or through ADB shell to find out which Bootloader you have.

DOWNLOADS

Optmized LineageOS 17.1: Google Drive

GApps: Open GApps or BitGApps

JDCTeam TWRP Recovery: HERE

TWRP Recovery Loki Patched: HERE

Aroma Addon: HERE

GAPPS

You can use Pico or Nano Open GApps or BiTGApps

TWRP

You can use either the latest and recommended JDCTeam Recovery or the latest Unified Official TWRP Recovery to flash the ROM.

If you have a variant with a locked but exploitable Bootloader like AT&T and Verizon then use the TWRP Recovery Locki Patched by mattgyver .

AROMA ADDON

You can multiple times flash the Addon Aroma to add or remove apps-mods, change bootanimations and contain debug tools.

You can find it HERE.

INSTALLATION GUIDES - COLLECTION LATEST BOOTLOADERS & MODEMS - AND A LOT MORE

You can follow the well-explained steps, find and download the latest Bootloader & Modem for your variant from the S4 Unified Guides/Collection thread by Retrial which contains:

COMPLETE GUIDE FOR THE BEST CLEAN INSTALL OF STOCK OR CUSTOM ROM FROM SCRATCH

COMPLETE GUIDE TO CLEAN INSTALL A CUSTOM ROM NOT FROM SCRATCH

COMPLETE GUIDE TO DIRTY INSTALL OVER YOUR CUSTOM ROM

COLLECTION FOR ALL VARIANTS WITH THE LATEST FIRMWARE - BOOTLOADERS & MODEMS - TWRP - GAPPS - ROOT SOLUTION - PIT FILES - SAMSUNG USB DRIVER - ODIN - USEFUL APPS - RECOMMENDED ROMS

YOUTUBE

Click HERE to watch a video review of Optimized LineageOS 17.1 Thanks to MikeTheTechSavvy

JDCTEAM UNIVERSE

You can find the total work of JDCTeam over the years HERE.

SOURCE CODE

Avaible at JDCTeam GitHub

CREDITS

Side - Lead Developer / The Boss

Buff99 - Minor Developer / Major Meddler

JDC Team

LineageOS

OpenGapps

JDCTeam

Buff - Buff99

Chibbo - Chibbo

Creeper - Creeper36

Diego Monaco - alucard_24

Dimitris Katikaridis - side

Franck Rohée - franzyroy

George Mantratzis - Retrial

Ray Daley - gadget!

Jim Silverlock - Jsilver73

Marco Zanin - -+BB+-

Matthew Booth - MattBooth

Mattia D'Alleva - AntaresOne

Mike Atkins - FernBch

Oliver - angelcalibur

Paul Harris - hawkerpaul

Paul Keith - javelinanddart

SalimPS - SalimPS

Simeon Ivanov - smstiv

Stefano Meroni - smeroni68

Yannis Menexes - SkL*

Vasileios Moisiadis - vmroot

You are welcome to join the Official JDC Team chat/test group in Slack​

XDA:DevDB Information

[JDCTeam] &#128287; Optimized LineageOS17.1 &#128287; v8.0 [12Oct], ROM for the Samsung Galaxy S4

Contributors

side, buff99, Retrial

ROM OS Version: Android 10

ROM Kernel: Linux 3.4.x

ROM Firmware Required: Lollipop compatible

Based On: LineageOS

Version Information

Status: Stable

Created 2019-12-16

Last Updated 2020-10-24