SysCfg

SysCfg also known as System Configuration is a partition on the NAND found on iOS devices.

It stores the Serial Numbers and Calibrations of hardware of the device, and the Software Behaviour bits.

It is a dictionary-like structure with each entry having a 4-byte (32-bit) key (Ex: SrNm).

With an AppleInternal image called Diags, that is found on EVT / DVT / PVT devices, this data can be modified and reflashed.

A smart programmer may be able to use a jailbreak and write a controller around this partition to do the same.

Modifications to these numbers are permanent but have advantages too.

A Chinese iOS device generally has limitations as defined by the Software Behaviour bits and the Region, modifying these in the SysCfg may remove them.

Keys

key	description	type
AICl	Accelerator Interrupt Calibration	Data
ARot	Accelerator Orientation Calibration	Data
ASCi	---? calibration data	Data
ASCl	Accelerator Sensitivity Calibration	Data
BCAL	Bluetooth Taurus Calibration	Data
BCAR	BackCamera Autofocus Recalibration	Data
BCMB	Back Camera Module Board	Data
BCMS	Back Camera Module Serialnumber	String
BLCl	Backlight Calibration	Data
BMac	Bluetooth Mac Address	Data (mac address)
BTRx	Bluetooth Reception Calibration	Data
BTTx	Bluetooth Transmission Calibration	Data
Batt	Battery Serial Number	String
CBAT	Charget input limit calibration	Data
CDCC	Compass hilow calibration	Data
CGSp	Coverglass type	Data (binary-hex)
CLHS	Housing Color	Data
CLCG	Coverglass Color	Data
CSCM	Compass Sensor Calibration	Data
CVCC	Compass VBUS Compensation	Data
DBCl	Display Backlight Compensation	Data
DClr	Device color	Data
DTCl	Display Temperature Calibration	Data
EMac	Ethernet Mac Address	Data (mac address)
FCMB	Front Camera Module Board	Data
FCMS	Front Camera Module Serialnumber	String
FDAC	Orb Dynamic Accelerator Calibration	Data
FG2G	WiFi Calibration Frequency Group 2G	Data
GICl	Gyro Interrupt Calibration	Data
GLCl	Gamma Tables Calibration	Data
GRot	Gyro Orientation Calibration	Data
GSCi	Gyro Sensitivity Matrix Inverse	Data
GSCl	Gyro Sensitivity Calibration	Data
GTCl	Gyro Trim Calibration
GYTT	Gyro Temp. Calibration	Data
LCM#	Liquid Crystal Monitor Serialnumber (LCD)	Data??
LSCI	Ambient Lightsensor Calibration	Data
LTAO	Low Temperature Accelerator Offset	Data
MLB#	Main Logicboard Serialnumber	String
MdlC	Murata WiFi Configuration	String
Mod#	Model number	String
MtCl	Multitouch Calibration	Data
MtSN	Multitouch Serialnumber	String
NFCl	Stockholm NFC Calibration	Data
NSrN	Touch-ID Serial Number	Data (hex-encoded string)
NoCl	---? Calibration	Data
NvSn	Apple SandDollar SerialNumber	Data
OFCl	Orb Force Calibration	Data
OrbC	Orb Calibration	Data
OrbG	Orb Gap Calibration	Data
PACV	---?	Data
PrCL	Pearl calibration	Data
PRSq	---?	Data
PRTT	Pressure Temperature compensation Table	Data
PxCl	Proximity Calibration	Data
RMd#	Regulatory Model Number	String
RxCL	Rosaline Calibration	Data
Regn	Region code	String
SPPO	Pressure Offset Calibration	Data
SpCl	Speaker Calibration	Data
SrNm	Device Serialnumber	String
STRB	Camera Strobe Color Calibration	String
SwBh	Software Behaviour Bits	Data
TCal	Audio Actuator Calibration	Data
VBCA	Speaker Configuration	Data
VBST	Speaker Configuration	Data
VPBR	Speaker Configuration	Data
W24R	Wifi Receiver 2.4Ghz Calibration	Data
WCAL	Wifi Calibration	Data
WMac	Wifi mac address	Data (mac address)
WRxT	Wifi Receiver temp. Calibration	Data