Galaxy S III 4G (GT-I9305)¶

• Table of contents
• Galaxy S III 4G (GT-I9305)
  • Replicant status
  • Replicant installation
  • Replicant usage
  • Replicant build
  • Replicant development
  • Freedom and privacy/security evaluation
  • Research
    • Hardware table
    • Software Configuration
      • Partitions
    • Mainlining

	Device	Galaxy S III 4G (GT-I9305)
	Manufacturer	Samsung
	Release date	September 2012
	Codename	i9305
	Status	Uncompleted
	Supported models	GT-I9305
	Latest images	Replicant 6.0 0002

Replicant status¶

Replicant status for the Galaxy S III 4G (GT-I9305): ReplicantStatus Replicant 6.0

Also, the Galaxy S3 4G (I9305) has an issue that makes it suddenly reboot. See the related bugreport for more details.

Replicant installation¶

Replicant installation for the Galaxy S III 4G (GT-I9305): ReplicantStatus Replicant 6.0

Replicant usage¶

• Galaxy S III 4G (GT-I9305) compass calibration: GalaxyS3I9300CompassCalibration

Replicant build¶

Replicant build for the Galaxy S III 4G (GT-I9305): GalaxyS3I9305Build

Replicant development¶

• Galaxy S III 4G (GT-I9305) UART: GalaxyS3I9300UART

Freedom and privacy/security evaluation¶

See GalaxyS3I9305PrivacySecurityEvaluation for more details.

Research¶

• QMI-RIL development of a modem interface
• The Galaxy SIII 4G (GT-I9305) has a Qualcomm MDM9615 modem. The quectel-modems osmocom wiki has some information related to running GNU/Linux on that modem, and information in its hardware:
  • Qualcomm MDM9615
  • Samsung Galaxy SIII 4G

Hardware table¶

Component	Name	Source	Status
SoC	Samsung Exynos 4412	iFixit	Linux kernel support
GPU	Mali 400	The Exynos Wikipedia page	Linux kernel and secret userspace
Audio Codec	WM8994	Linux kernel	Linux kernel support (ALSA)
Modem	Qualcomm MDM9615	Linux kernel	free library for QMI protocol, no free RIL yet
Wi-Fi	BCM4334	Linux kernel	Linux kernel support, proprietary loaded firmware
Bluetooth	BCM4334	Linux kernel	Linux kernel support, proprietary loaded firmware
NFC	PN544	Linux kernel	Linux kernel support
GPS	Qualcomm MDM9615	Linux kernel	partly free userspace
Accelerometer	LSM330DLC	Linux kernel	Linux kernel support, free userspace
Compass	AKM8975	Kernel sources	Linux kernel support, free userspace
Light/proximity sensor	CM36651	Kernel sources	Linux kernel support, free userspace
Gyroscope	LSM330DLC	Kernel sources	Linux kernel support, free userspace
Barometer	LPS331AP	Kernel sources	Linux kernel support, free userspace
Camera (back)	S5C73M3	Linux kernel	Linux kernel support, free userspace
Camera (front)	S5K6A3	Linux kernel	Linux kernel support, free userspace, proprietary loaded firmware

Software Configuration¶

• GalaxyS3I9305Pit: Galaxy S III 4G (GT-I9305) PIT (a partition table)
• system fstab: fstab.smdk4x12

Partitions¶

WARNING some content may not be the same on your device

PIT	Linux name	block device	mount point	partition type	Description	size or size@location for 16G eMMC
BOOTLOADER	mmcblk0boot0, not visible on Replicant 6.0			Unknown, raw data?	The bootloader	2M
TZSW				Unknown, raw data?	The signed TrustZone OS
Not visible in the PIT	mmcblk0boot1, not visible on Replicant 6.0			empty	Unused	2M
PIT	No partition on Replicant 6.0	on mmcblk0 (use print-pit to find the location)	None	The PIT partition table		8KiB2@17KiB2
BOTA0		mmcblk0p1	None	empty	?	4 MiB3
BOTA1		mmcblk0p2
EFS		mmcblk0p3	/efs	ext4	modem data partition
BOOT		mmcblk0p8	None	bootimage (mkbootimg)	boot.img partition
RECOVERY		mmcblk0p9	None	bootimage (mkbootimg)	recovery partition
RADIO		mmcblk0p10	/firmware	vfat	modem firmware partition
TOMBSTONES		mmcblk0p11	/tombstones	ext4	?
SYSTEM		mmcblk0p13	/system	ext4	system partition
USERDATA		mmcblk0p16	/data	ext4	data partition

² For the Kib see https://en.wikipedia.org/wiki/Kibibyte

Mainlining¶

See https://wiki.postmarketos.org/wiki/Samsung_Galaxy_SIII_LTE_(samsung-i9305)#Mainline_Kernel, https://blog.forkwhiletrue.me/pages/midas-mainline/. The mainline kernel probably needs the equivalent of https://github.com/LineageOS/android_kernel_samsung_smdk4412/blob/b7ffe7f2aea2391737cdeac2a33217ee0ea4f2ba/arch/arm/mach-exynos/mdm_hsic_pm.c#L1003 for the modem to work.