Nexus S (I902x)¶

• Table of contents
• Nexus S (I902x)
  • Replicant status
  • Installation guide
  • Build guide
  • Technical infos
    • Hardware table

	Device	Nexus S (I902x)
	Manufacturer	Google/Samsung
	Codename	crespo
	Ships with root	No
	Root possible	Yes, bootloader is easy to unlock
	SIM Unlocked	Possible
	In production	Yes
	Replicant status	Supported, GSM flavors (I9020, I9020A, I9023)
	Developers involved	PaulK
	Replicant version	Replicant 4.2
	Last image	Replicant 4.2 0001

Replicant status¶

Replicant status for the Nexus S (I902x): ReplicantStatus

Known freedom and security issues:

• Proprietary and likely signed bootloader
• Modem, Wi-Fi, Bluetooth and NFC firmwares are non-free
• Modem can access part of the CPU RAM and could use it to spy

Installation guide¶

Installation guide for the Nexus S (I902x): NexusSI902xInstallation

Build guide¶

Build guide for the Nexus S (I902x): NexusSI902xBuild

Technical infos¶

• List of the Nexus S (I902x) firmwares: NexusSI902xFirmwares

• Details about the S5PC110 Hardware design used in the Nexus S (I902x): S5PC110HardwareDesign
• For Documentation on the preliminary work for freeing its bootloader: S5PC110Bootloader

• Status of the Samsung-RIL modem implementation: Samsung-RIL
• Status of the Broadcom 4751 GPS chip implementation: BCM4751

Hardware table¶

Component	Name	Source	Protocol/implementation
SoC	Samsung S5PC110/S5PV210	Linux kernel	Linux kernel
GPU	PowerVR SGX540	https://secure.wikimedia.org/wikipedia/en/wiki/Exynos	Linux kernel and secret userspace
Audio Codec	WM8994	Linux kernel	Linux kernel ALSA driver
Modem	XMM6160	iFixit	Secret protocol: Samsung-IPC, implemented in libsamsung-ipc and samsung-ril
Wi-Fi	BCM4329	Linux kernel	implemented in Wi-Fi driver
Bluetooth	BCM4329	Linux kernel	implemented in Bluetooth driver
NFC	PN544	Linux kernel	Linux kernel
GPS	BCM4751	http://www.zdnet.com/photos/google-nexus-s-teardown/6189263?seq=59	MEIF, Unknown
Accelerometer	KR3DM	Linux kernel	Linux kernel, Samsung-Sensors
Compass	AKM8973	Kernel sources	Linux kernel, secret userspace
Camera	S5KA3DFX/S5K4ECGX	Linux kernel	Linux kernel, FIMC, V4l2