Samsung Galaxy SIII LTE (samsung-i9305)

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Samsung Galaxy S III
Samsung Galaxy SIII
Samsung Galaxy SIII
Manufacturer Samsung
Name Galaxy S III
Codename samsung-i9300, samsung-i9305
Released 2012
Category testing
Original software Android 4.1.1
Chipset Exynos 4412 Quad
CPU Quad-core 1.4 GHz Cortex-A9
GPU Mali-400MP4
Display 720x1280 Super AMOLED
Storage 16 GB/32 GB
Memory 1 GB(GT-i9300 & SHW-M440S)
2 GB(LTE Variants)
Architecture armv7
USB Networking
3D Acceleration
Mobile data

Warning! The mainline kernel for device has been reported to cause hardware failure! Specifically, resulting in broken panels and devices unable to boot properly. Be careful! See the mainline section of this article for more information


Basic info

So far, what works for samsung-i9305 (Galaxy SIII LTE version) also works for the samsung-i9300 (Galaxy SIII international GSM version without LTE, Also known as Galaxy S III 3G SHW-M440S in South Korea) and samsung-shv-e210s (a Korean variant). (None of these SIII models should be confused with the North American SIII models, which require OS builds.)

Code name is MIDAS. Search for midas-mainline to find more info.

Users owning this device

  • Arthurlutz (Notes: /e/ 0.11 (android 7 pie))
  • Cick0 (Notes: GT-i9300)
  • DALEK 77 (Notes: i9300)
  • Eloy
  • EnderNightLord (Notes: i9300 1gb ram)
  • Grimler
  • Illen (Notes: is a GT-i9300. Battery is broken, works on charger. Runs mainline U-Boot/Linux.)
  • KuroeHanako (Notes: SHV-E210S, Pebble Blue)
  • Mossroy (Notes: sometimes used : It can not be flashed easily. Seems to have a hardware issue with current consumption, even with a new battery)
  • Neilvandyke (Notes: has GT-i9300)
  • Newbyte (Notes: i9300, revived from the dead with a new battery)
  • Ungeskriptet (Notes: GT-i9300, Pebble Blue)

How to enter flash mode

  • Hold power + Home + volume down
  • When prompted, release all buttons and press volume up


Set phone to ODIN mode

 1. Turn off phone
 2. Connect USB cable
 3. Hold VOLUME_DOWN + HOME + POWER until you get Warning!! screen
 4. Push VOLUME_UP to continue to ODIN mode screen
# Ready the build
pmbootstrap init # (weston or xfce4 should do)

# Install rootfs to Micro SD Card
pmbootstrap install --sdcard=/dev/mmcblk0/1/2/3 # (will depend on where your Micro SD Card is mounted)

# Put the i9305 / i9300 into odin mode with the steps above and flash the kernel (to boot from the Micro SD Card)
pmbootstrap flasher flash_kernel # (in odin mode)

# and it should reboot automatically

Installing with downstream kernel

mkdir ~/code
cd ~/code
git clone

alias pmbootstrap=~/code/pmbootstrap/
pmbootstrap init
#work path default

pmbootstrap initfs hook_add debug-shell
#Check log with 'tail -f ~/.local/var/pmbootstrap/log.txt'

#CREATE RECOVERY ZIP (for flashing with TWRP)
pmbootstrap install --android-recovery-zip

cp ~/.local/var/pmbootstrap/chroot_buildroot_armhf/var/lib/postmarketos-android-recovery-installer/ /media/computer/sdcard/
#Insert sdcard in phone
#Reboot on recovery with up+home+power
#Install from zip

#Connect with USB cable


To get the WiFi working, you'll need to modify the wpa_supplicant configuration. If this is not done, wpa_supplicant starts with -ip2p0 which is not supported on our device.

 $ echo 'wpa_supplicant_args="-Dwext"' | sudo tee /etc/conf.d/wpa_supplicant

You can use either NetworkManager or networking and wpa_supplicant. NetworkManager is recommend in most cases as it handles reconnection.

Network Manager

Ensure the networkmanger service is running

 $ sudo rc-status | grep 'networkmanager'

if it not visible, try to start the service:

 $ sudo rc-service networkmanager start

Search for available WiFi networks and connect to network

 $ sudo nmcli device wifi list ifname wlan0
 $ sudo nmcli --ask dev wifi connect SSID

Reboot and you should be connected.

Networking and wpa_supplicant

You will need to manually configure the interfaces by creating



 $ sudo vi /etc/network/interfaces
  auto lo
  iface lo inet loopback
  auto wlan0
  iface wlan0 inet dhcp

Save changes and add networking to start with system

$ sudo rc-update add networking

Add WiFi network information

$ wpa_passphrase YOUR_SSID YOUR_PASSPHRASE | sudo tee /etc/wpa_supplicant/wpa_supplicant.conf

Restart services

$ sudo rc-service wpa_supplicant restart
$ sudo rc-service networking start

WiFi on mainline

To get WiFi working on the mainline kernel install linux-firmware-brcm, then on the device copy nvram_net.txt like this:

# cp /lib/firmware/postmarketos/nvram_net.txt /lib/firmware/brcm/brcmfmac4334-sdio.txt

Afterwards reboot the device and connect to a WiFi network with NetworkManager or wpa_supplicant.

Mainline Kernel

I will preface this with the following reiteration of the warning at the top: The mainline kernel for this device has been reported to cause hardware failure. Reported failures include screen/panel damage and the device only turning on if a charger is plugged in (and also this). Be careful when using the mainline kernel with this device, and don't use it unless you can risk effectively bricking your i9300/i9305.

Thanks in large part to the Midas on Mainline work that was done a few years ago, we now have initial mainline support for this device. The pmOS patch that added initial support is here.

The pmports repo for this device's linux-postmarketos-exynos4 mainline kernel is here.

@pmOS_devices announcement from Nov 11, 2020:

Upstream dts: exynos4412-i9305.dts

Blog announcement:

Upstream kernel support matrix: Midas on Mainline.

Note that a patch is required to make it work with the stock samsung bootloader and this is included in the pmports mainline repo above.

forkbomb from LineageOS got mainline u-boot running on this device and wrote about it in this blog post: [1]

Replicant has this device booting with mainline Linux and almost mainline U-Boot with only the need for a few patches on top and would like to collaborate with us [2]

The Qualcomm Gobi MDM9615 Modem seems to have mainline kernel support as well: [3]

The Replicant project is working on getting the i9300 modem working with a mainline kernel in a way that pmOS can also utilize:

LTE modem support with the mainline kernel on Replicant is being done here: The Note II discussed here has the same or very similar modem as the i9305.

Replicant and LineageOS successfully got the Lima driver for Mesa working on Mali when using mainline linux: video success announcement linux-postmarketos-exynos4 now also has the same support.

Replicant currently supports this device in 6.0 and is doing a lot of research in order to get it running with a mainline kernel with a mainline bootloader for Replicant 11. More bootloader research is here.

xboot might be a completely free bootloader option. Looks to have zero proprietary blobs.

See also

Install with mainline kernel (WIP, not functional yet)

Note: Is now "linux-postmarketos-exynos4" .

#Export image files in ~/.local/var/pmbootstrap/chroot_rootfs_samsung-i9305/boot/
pmbootstrap export

#5,3M -rw-r--r--  1 root root 5,3M déc.  22 20:31 boot.img-samsung-i9305 (initramfs + vmlinuz)
#1,3M -rw-r--r--  1 root root 1,3M déc.  22 20:31 initramfs-samsung-i9305
#6,1M -rw-r--r--  1 root root 6,1M déc.  22 20:31 initramfs-samsung-i9305-extra
#4,1M -rw-r--r--  1 root root 4,1M nov.   5 17:30 vmlinuz-samsung-i9305

#Get linux-next
cd ~/code
# Case 1 : first checkout
git clone linux
cd linux/
git fetch origin
git reset --hard origin/master
# Case 2 : update
cd linux/
git checkout master
git pull

#Prepare compile with i9305 defconfig in ~/code/linux/arch/arm/configs
source ~/code/pmbootstrap/helpers/
make exynos_defconfig
#DTS : Note that ~/code/linux/arch/arm/boot/dts/exynos4412-i9305.dts already exists and should work
#Makefile in ~/code/linux/arch/arm/boot/dts/ already contains this DTS

#Kernel compilation
make -j5

#Prepare shell
pmbootstrap chroot -- apk add abootimg android-tools mkbootimg dtbtool findutils
export DEVICE="$(pmbootstrap config device)"
export WORK="$(pmbootstrap config work)"
export TEMP="$WORK/chroot_native/tmp/mainline/"
mkdir -p "$TEMP"

#Patch boot image
cd ~/code/linux/.output/arch/arm/boot
cat zImage dts/exynos4412-i9305.dtb > "$TEMP"/zImage-dtb
cp "/tmp/postmarketOS-export/boot.img-$DEVICE" "$TEMP/boot.img"
pmbootstrap chroot
abootimg -u /tmp/mainline/boot.img  -k /tmp/mainline/zImage-dtb -c bootsize=8955904

#Flash with Heimdall - WARNING - NOT FUNCTIONNAL YET
# enter download mode with down+home+power
# Connect usb
# click 'up'
heimdall detect
heimdall flash --BOOT ~/.local/var/pmbootstrap/chroot_native/tmp/mainline/boot.img