[Galaxy S III Original Android Development] hgunduz295:
LineageOS is a free, community built, aftermarket firmware distribution of Android 7.1 (Nougat), which is designed to increase performance and reliability over stock Android for your device.

#include "std_disclaimer.h"
/*
* Your warranty is void.
*
* I am 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 it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/

LineageOS is based on the Android Open Source Project with extra contributions from many people within the Android community. All the source code for LineageOS is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit Gerrit Code Review.

Wiki

Official LineageOS Wiki: http://wiki.lineageos.org/devices/i9300

Known issues

[MENTION=4122877]curiousrom[/MENTION] has a list of known issues/workarounds. You can see them here: https://xdaforums.com/showpost.php?p=76224958&postcount=4419

Installation

(NOTE: if you experience robotic voice during calls: see the FAQ for a fix)

Upgrading from CyanogenMod/unofficial LineageOS without wiping

Unfortunately, now you have to wipe to come from CM - see "First time LineageOS14.1 installation on your Galaxy S III", or if you're brave try the instructions on changing keys.

First time LineageOS 14.1 installation on your Galaxy S III:

Read the official Wiki page

Flash a custom recovery via Heimdall or Odin

Push GApps (arm) and the Lineage 14.1 zip to your device

Boot into Recovery

Perform factory reset

Flash the Lineage 14.1 zip from SD card

Flash GApps from SD card

Reboot

Upgrading from earlier version of LineageOS:

Update your recovery - Lineage Recovery will be done automatically, TWRP can be downloaded from here (NOTE: you need 3.0.2-2 or higher to automatically install updates in Lineage 14.1)

Push the new Lineage 14.1 zip to your SD card

Boot into Recovery

Flash the Lineage 14.1 zip from SD card

Flash the most recent GApps for 7.1 if you are upgrading from earlier android version

Reboot

Downloads

Install packages: https://download.lineage.microg.org/i9300/lineage-14.1-20190302-microG-i9300.zip

Google Apps (arm): https://wiki.lineageos.org/gapps

Root add-on (arm): https://download.lineageos.org/extras

Reporting bugs

Bug reports belong on JIRA. See our wiki for more information on using JIRA.

I do not check this thread regularly for bug reports. Using JIRA makes tracking down & debugging bugs a lot easier. Feel free to use this thread to discuss bugs, though :)

DO NOT report bugs if you're running a custom kernel

DO NOT report bugs if you've modified system files

DO NOT report bugs if you've installed xposed and/or other mods

Grab a logcat right after the problem has occurred. (Please include at least a few pages of the log, not just the last few lines, unless you know what you're doing.)

See how to submit a bug report for the appropriate place to report your bug (NOTE: the majority of bugs need to go in the BUGBASH tracker, which is only open on weekends).

Remember to provide as much info as possible. The more info you provide, the more likely that the bug will be solved. Please also do not report known issues or bugs already reported on JIRA. Any bug not reported in the bug report format below may be ignored.

Phone Informations
* Lineage version
* Gapps version
What you did:
* Wipe data: y/n
* Upgrade from previous official cm build: y/n
* Restore with titanium backup: y/n
You're using (if yes write which one) :
* Task killer
* Phone cleaner / Battery enhancer apps
* Non-stock kernel
* Modified kernel settings
* Other mods
Bug info:
* Last version it worked on
* Repro steps

Getting help

You can ask for help on our subreddit, on IRC: #LineageOS on Freenode

F.A.Q.

Root?

Flashable zips to install/uninstall root can be found here. Download the "arm" variants.

Robotic voice during calls?

Try using the I9300XXUGMK6 modem. Instructions are here.

GPS Issues?

Probably a hardware issue. Try tightening the screws on the back of the device, or see this video for more information (thanks to [MENTION=5731927]baltics[/MENTION] for the link)

The LineageOS team would like to thank everyone involved in helping with testing, coding, debugging & documenting! Enjoy!

XDA:DevDB Information

LineageOS 14.1 for i9300, ROM for the Samsung Galaxy S III I9300

Contributors

forkbomb444

Source Code: https://github.com/LineageOS

ROM OS Version: 7.x Nougat

ROM Kernel: Linux 3.0.x

Version Information

Status: Nightly