[Nexus 5 Q&A, Help & Troubleshooting] drewss02:
Here is the build.prop with working hangouts

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=KVT49L

ro.build.display.id=vu_ls970-userdebug 4.4.2 KVT49L eng.spleef.20140311.092212 test-keys

ro.build.version.incremental=eng.spleef.20140311.092212

ro.build.version.sdk=19

ro.build.version.codename=REL

ro.build.version.release=4.4.2

ro.build.date=Tue Mar 11 09:24:20 CDT 2014

ro.build.date.utc=1394547860

ro.build.type=userdebug

ro.build.user=android-build

ro.build.host=spleef-100-5050

ro.build.tags=test-keys

ro.product.model=LG-LS970

ro.product.brand=LGE

ro.product.name=vu_ls970

ro.product.device=ls970

ro.product.board=geehrc

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=LGE

ro.product.locale.language=en

ro.product.locale.region=US

ro.wifi.channels=

ro.board.platform=msm8960

# ro.build.product is obsolete; use ro.product.device

ro.build.product=ls970

# Do not try to parse ro.build.description or .fingerprint

ro.build.description=occam-user 4.2.2 JDQ39 573038 release-keys

ro.build.fingerprint=google/occam/mako:4.2.2/JDQ39/573038:user/release-keys

ro.build.characteristics=nosdcard

# end build properties

#

# ADDITIONAL_BUILD_PROPERTIES

#

keyguard.no_require_sim=true

ro.com.android.dataroaming=false

ro.com.android.dateformat=MM-dd-yyyy

ro.carrier=unknown

ro.config.notification_sound=OnTheHunt.ogg

ro.config.alarm_alert=Alarm_Classic.ogg

ro.opengles.version=196608

persist.audio.handset.mic.type=digital

persist.audio.dualmic.config=endfire

persist.audio.fluence.voicecall=true

persist.audio.handset.mic=dmic

persist.audio.fluence.mode=endfire

persist.audio.lowlatency.rec=false

af.resampler.quality=4

persist.radio.apm_sim_not_pwdn=1

ro.telephony.call_ring.multiple=0

ro.telephony.ril_class=LgeLteRIL

ro.telephony.ril.v3=qcomdsds

persist.hwc.mdpcomp.enable=true

drm.service.enabled=true

wifi.interface=wlan0

wifi.supplicant_scan_interval=15

media.aac_51_output_enabled=true

debug.egl.recordable.rgba8888=1

ro.qc.sensors.wl_dis=true

ro.qualcomm.sensors.smd=true

ro.sf.lcd_density=320

ro.qualcomm.bt.hci_transport=smd

debug.prerotation.disable=1

dalvik.vm.heapstartsize=8m

dalvik.vm.heapgrowthlimit=192m

dalvik.vm.heapsize=512m

dalvik.vm.heaptargetutilization=0.75

dalvik.vm.heapminfree=512k

dalvik.vm.heapmaxfree=8m

ro.debuggable=1

persist.service.adb.enable=1

ro.cdma.home.operator.numeric=310120

ro.cdma.home.operator.alpha=Sprint

telephony.lteOnCdmaDevice=1

telephony.lte.cdma.device=1

ro.telephony.default_network=8

ro.ril.def.preferred.network=8

ril.subscription.types=NV,RUIM

ro.cdma.subscribe_on_ruim_ready=true

persist.radio.no_wait_for_card=1

telephony.sms.pseudo_multipart=1

DEVICE_PROVISIONED=1

ro.com.google.clientidbase=android-google

ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html

ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html

ro.com.android.wifi-watchlist=GoogleGuest

ro.error.receiver.system.apps=com.google.android.feedback

ro.com.google.locationfeatures=1

ro.setupwizard.enterprise_mode=1

persist.sys.root_access=3

ro.build.selinux=1

ro.config.ringtone=Scarabaeus.ogg

ro.vu.version=vu_ls970_kitkat_unofficial_2014-03-11

ro.vu.branch=kitkat

ro.vu.device=ls970

persist.sys.camera-sound=1

gsm.current.phone-type=2

persist.sys.dalvik.vm.lib=libdvm.so

dalvik.vm.lockprof.threshold=500

dalvik.vm.dexopt-flags=m=y

net.bt.name=Android

dalvik.vm.stack-trace-file=/data/anr/traces.txt

And here is the non working one

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=KVT49L

ro.build.display.id=carbon_ls970-userdebug 4.4.2 KVT49L 58e2240e1d test-keys

ro.build.version.incremental=58e2240e1d

ro.build.version.sdk=19

ro.build.version.codename=REL

ro.build.version.release=4.4.2

ro.build.date=Sun Jun 1 15:58:55 CDT 2014

ro.build.date.utc=1401656335

ro.build.type=user

ro.build.user=matt

ro.build.host=Matt

ro.build.tags=test-keys

ro.product.brand=LGE

ro.product.name=occam

ro.product.board=geehrc

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=LGE

ro.product.locale.language=en

ro.product.locale.region=US

ro.wifi.channels=

ro.board.platform=msm8960

# ro.build.product is obsolete; use ro.product.device

ro.build.product=ls970

ro.product.model=LG-LS970

ro.product.device=ls970

# Do not try to parse ro.build.description or .fingerprint

ro.build.description=occam-user 4.2.2 JDQ39 573038 release-keys

ro.build.fingerprint=google/occam/mako:4.2.2/JDQ39/573038:user/release-keys

ro.build.characteristics=nosdcard

ro.carbon.device=ls970

# end build properties

#

# ADDITIONAL_BUILD_PROPERTIES

#

keyguard.no_require_sim=true

ro.com.android.dateformat=MM-dd-yyyy

ro.carrier=unknown

ro.opengles.version=196608

persist.audio.handset.mic.type=digital

persist.audio.dualmic.config=endfire

persist.audio.fluence.voicecall=true

persist.audio.handset.mic=dmic

persist.audio.fluence.mode=endfire

persist.audio.lowlatency.rec=false

af.resampler.quality=4

persist.radio.apm_sim_not_pwdn=1

ro.telephony.call_ring.multiple=0

ro.telephony.ril_class=LgeLteRIL

ro.telephony.ril.v3=qcomdsds

persist.hwc.mdpcomp.enable=true

drm.service.enabled=true

wifi.interface=wlan0

wifi.supplicant_scan_interval=15

media.aac_51_output_enabled=true

debug.egl.recordable.rgba8888=1

ro.qc.sensors.wl_dis=true

ro.qualcomm.sensors.smd=true

ro.sf.lcd_density=320

ro.qualcomm.bt.hci_transport=smd

debug.prerotation.disable=1

dalvik.vm.heapstartsize=8m

dalvik.vm.heapgrowthlimit=192m

dalvik.vm.heapsize=512m

dalvik.vm.heaptargetutilization=0.75

dalvik.vm.heapminfree=512k

dalvik.vm.heapmaxfree=8m

ro.debuggable=1

persist.service.adb.enable=1

ro.cdma.home.operator.numeric=310120

ro.cdma.home.operator.alpha=Sprint

telephony.lteOnCdmaDevice=1

telephony.lte.cdma.device=1

ro.telephony.default_network=8

ro.ril.def.preferred.network=8

ril.subscription.types=NV,RUIM

ro.cdma.subscribe_on_ruim_ready=true

persist.radio.no_wait_for_card=1

telephony.sms.pseudo_multipart=1

DEVICE_PROVISIONED=1

ro.com.google.clientidbase=android-google

ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html

ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html

ro.com.android.wifi-watchlist=GoogleGuest

ro.setupwizard.enterprise_mode=1

ro.com.android.dataroaming=false

persist.sys.root_access=3

ro.build.selinux=1

persist.sys.camera-sound=1

persist.sys.dun.override=0

ro.carbon.version=CARBON-KK-UNOFFICIAL-20140601-1556

ro.romstats.askfirst=1

ro.romstats.ga=UA-43747246-1

ro.romstats.name=CarbonRom-

ro.romstats.url=http://stats.carbon-rom.com

ro.romstats.version=CARBON-KK-UNOFFICIAL-20140601-1556

persist.sys.recovery_update=false

ro.config.ringtone=Hydra.ogg

ro.config.notification_sound=Proxima.ogg

ro.config.alarm_alert=Cesium.ogg

ro.buildzipid=carbon.ls970.060114.155644

persist.sys.dalvik.vm.lib=libdvm.so

dalvik.vm.lockprof.threshold=500

dalvik.vm.dexopt-flags=m=y

net.bt.name=Android

dalvik.vm.stack-trace-file=/data/anr/traces.txt