List of GSC bits

GSC bit	Sourced from model definition file	Description
720p	Yes
accelerometer	Yes	iPhone OS 1.0+
accessibility	Yes	Settings>General>Accessibility. iPhone OS 3.0+
additional-text-tones	Yes	New SMS sounds originally only for the iPhone 4. iOS >=4.2.1. Backported to the 3GS since iOS 5b3.
all-features	Yes
any-telephony	Yes	Cellular radio
apple-internal-install	Yes	Used in internal firmwares, displays a watermark with Apple contact info on device lockscreen, retail firmwares just show a "INTERNAL_INSTALL_LEGAL_DECLARATION" string
applicationInstallation	Yes	Allow installation of apps from appstore. Possibly disable for demo units.
armv6	Yes	CPU can execute ARM6 instructions
armv7	Yes	CPU can execute ARM7 instructions
assistant	Yes	Siri. iOS ≥5.0
auto-focus-camera	Yes	Camera is not focus free. iPhone OS 3.0+
bluetooth	Yes	Device has Bluetooth support.
bluetooth-le	Yes	Found on iPhone 4S. iOS ≥5
camera-flash	Yes	LED flash, iOS 4.0+
cameraRestriction	No	Camera disabled via on-device or externally imposed Restrictions
cellular-data	No	Wireless modem
contains-cellular-radio	?
data-plan	Unlikely
delay-sleep-for-headset-click	Yes
device-name-localized	?	Unknown
device-name	Yes	Device class, e.g. "iPhone"
dictation	Yes	Microphone key on on-screen keyboard
display-mirroring	Yes	AirPlay whole screen streaming
displayport	?	Can output video through dock connector
encrypted-data-partition	Yes	Hardware encryption for iPhone 3GS and newer devices. iPhone OS 3.0+
encode-aac	Yes
enforce-googlemail	No	(Shows Google Mail logo instead of Gmail in the UK)
enforce-shutter-click	No	Forces camera click even in silent mode in Japan and another country I don't remember -- look in Regional*.plist files under Celestial framework
explicitContentRestriction	No	"Explicit" songs and podcasts disabled in Settings/General/Restrictions
fcc-logos-via-software	Yes	Enables PNG viewer in Settings/General/About/[Legal]/Regulatory
front-facing-camera	Yes	Can take photos using Front-Facing Camera. iOS 4.0+
full-6	Yes	Found on an iPhone 4 S 6.1. Enables full iOS 6 features, see here
gamekit	Yes	Game Center
gas-gauge-battery	Yes	Precise battery measurement, enables Settings>General>Usage>Battery Percentage. iPhone OS 3.0+
gps	Yes	iPhone OS 2.0+
green-tea	No	(turned on in iPhones sold in China)
not-green-tea	No
gyroscope	Yes	Does device have gyroscope? iOS 4.0+
h264-encoder	Yes	Can encode audio?video? iPhone OS 3.0+
hall-effect-sensor	Yes	(Very likely the magnetic sleep switch on iPad 2)
hardware-keyboard	Yes
hd-video-capture	Yes
hdr-image-capture	Yes	HDR, iOS 4.1+. Seems to depend on camera-flash on 4.3+
hearingaid-audio-equalization	Yes
hearingaid-low-energy-audio	Yes
hearingaid-power-reduction	Yes
hiccough-interval	Yes	(Unknown)
hide-non-default-apps	Yes	Allows non-Apple apps from /Applications to be displayed on Springboard.
hidpi	Yes	Retina display
homescreen-wallpaper	Yes	Also controls grill vs. reflective dock. iOS ≥4
hw-encode-snapshots	Yes	??
hw-snapshots-need-purplegfx	Yes	??
international-settings	Yes	(Settings/General/International, wildly used in iPhone OS 1.1+)
io-surface-backed-images	Yes	??
ipad	Yes	(Is iPad. used to be "wildcat".)
launch-mode	No	iPad SpringBoard orientation??
load-thumbnails-while-scrolling	Yes	??
location-services	Yes
location-reminders	Yes	Geofence support?
lte-device	No	LTE iDevice.
magnetometer	Yes	iPhone OS 3.0+
main-screen-height	No
main-screen-width	No
main-screen-orientation	No
main-screen-scale	No
MapKitAvailable	No
MapKitAvailableGreenTea	No
MapKitUserShiftingGreenTea	No
MapKitUserShiftingNonGreenTea	No
MapsUserShiftingGreenTea	No
MapsUserShiftingNonGreenTea	No
MapsVisible	No	(not sure whether it is a GSC bit)
MapsVisibleGreenTea	No	(not sure whether it is a GSC bit, also green tea = for chinese market)
marketing-name	Yes	Brand name of your device e.g. "iPhone 3GS"
mars-volta	?	spotted in iOS 5.0.1b2 4S. Required for Siri.
microphone	Yes	Presence of in-built microphone
mms	Yes	MMS functionality. Disabled on 2G iPhone.
multitasking	Yes	Allows multitasking
multitasking-gestures	Yes	The infamous iPad swipe-to-cycle-apps and open multitasking 4- or 5-fingered actions. Requires modifications to Springboard to enable on iOS 5.x+
nike-ipod	Yes	Nike+iPod internal (or external with hacked drivers) receiver, iPhone OS 2.?+
opengles-1	Yes	Supports OpenGL 1
opengles-2	Yes	Supports OpenGL 2
peer-peer	Yes	Bluetooth "gaming" extensions, iPhone OS 3.0+
personal-hotspot	Yes
photo-adjustments	Yes	Rotate/auto exposure/redeye correct/crop in the Photos app
photo-stream	No
piezo-clicker	Yes	Integrated non-speaker in iPod touch 1G
post-animate	No	??
pre-animate	No	??
proximity-sensor	Yes	iPhone OS 1.0+
ptp-large-files	Yes	PTP is the standard camera interface protocol used to access the Camera Roll from generic PC software
ringer-switch	Yes	Mute switch
screen-dimensions	No	??
sensitive-ui	No	??
serial	No	??
shoebox	Yes	Passbook
siri-gesture	Yes	Settings/General/Siri/Raise-to-speak
sms	Yes	Can send text messages. iPhone OS 1.0+
software-dimming-alpha	Yes	??
stand-alone-contacts	Yes	Control display of standalone Contacts app in Springboard
still-camera	Yes	Can take photos. iPhone OS 1.0 or 2.0+
telephony	Yes	Can make phone calls. iPhone OS 1.0+
telephony-maximum-generation	Yes	(Modem type. 2.5 = EDGE 3 = 3G 3.5 = HSDPA)
tv-out-crossfade	Yes	(Photos app slideshow transitions enabled)
tv-out-settings	No	(not sure whether it is a GSC bit, sounds like a SpringBoard property)
unified-ipod	Yes	Joins Music and Videos into iPod on iOS <5. Still enabled on latest iPhones where it won't matter…
venice	Yes	FaceTime
3Gvenice	Yes	FaceTime over 3G
video-camera	Yes	Can record videos. iPhone OS 3.0+
video-stills	Yes	Can take photo during video recording. iPhone OS 6.0+
voice-control	Yes	Voice control available. iPhone OS 3.0+
voip	Yes	VoIP multitasking??
volume-buttons	Yes
wapi	?	??
wifi	Yes	Contains Wi-Fi radio.
youtube	Yes	YouTube app accessible, iOS <6b4
youtubePlugin	?