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	Can install apps?? used in 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
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
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
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	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	??
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
microphone	Yes
mms	Yes
multitasking	Yes
multitasking-gestures	Yes	The infamous iPad swipe-to-cycle-apps and open multitasking 4- or 5-fingered actions
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	??
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