[Android Q&A, Help & Troubleshooting] Eclectica:
Not sure if this helps, but here is an unmodified build.prop file extracted from a CWM backup of the stock ROM:

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=KOT49H

ro.build.display.id=ALPS.KK1.MP1.V2.11

ro.build.version.incremental=eng.ysm.1410693248

ro.custom.build.version=LENOVO_20140914

ro.custom.build.versiondisplay=LENOVO_20140914

ro.build.version.sdk=19

ro.build.version.codename=REL

ro.build.version.release=4.4.2

ro.build.date=2014年 09月 14日 星期日 19:16:25 CST

ro.build.date.utc=1410693385

ro.build.type=user

ro.build.user=ysm

ro.build.host=tastech2-desktop

ro.build.tags=test-keys

ro.product.model=LENOVO

ro.product.modeldisplay=LENOVO

ro.product.brand=LENOVO

ro.product.name=LENOVO

ro.product.device=LENOVO

ro.product.board=LENOVO

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=LENOVO

persist.sys.language=en

persist.sys.country=US

persist.sys.localevar=

persist.sys.timezone=America/New_York

ro.product.locale.language=en

ro.product.locale.region=US

ro.wifi.channels=

ro.board.platform=

# ro.build.product is obsolete; use ro.product.device

ro.build.product=LENOVO

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

ro.build.description=v820_kk-user 4.4.2 KOT49H eng.ysm.1410693248 test-keys

ro.build.fingerprint=alps/v820_kk/v820_kk:4.4.2/KOT49H/1410693248:user/test-keys

ro.build.flavor=

ro.build.characteristics=default

# end build properties

ro.custom.lcm.id=sh1282_boe_c3_lianxin

ro.custom.camera.version=ov5648_mipi_raw s5k5eayx_yuv s5k5e2ya_mipi_raw siv121du_yuv

ro.custom.camera.pixel=main_500w_and_200w__sub_200w_and_30w

ro.custom.fm.id=6628

ro.custom.modem=hexing82_hspa

ro.custom.alsp=APDS9930 ltr558

# begin mediatek build properties

ro.mediatek.version.release=ALPS.KK1.MP1.V2.11

ro.mediatek.platform=MT6582

ro.mediatek.chip_ver=S01

ro.mediatek.version.branch=KK1.MP1

ro.mediatek.version.sdk=2

# end mediatek build properties

#

# from out/target/product/v820_kk/obj/CUSTGEN/config/system.prop

#

#

# system.prop for generic sdk

#

rild.libpath=/system/lib/mtk-ril.so

rild.libargs=-d /dev/ttyC0

# MTK, Infinity, 20090720 {

wifi.interface=wlan0

# MTK, Infinity, 20090720 }

# MTK, mtk03034, 20101210 {

ro.mediatek.wlan.wsc=1

# MTK, mtk03034 20101210}

# MTK, mtk03034, 20110318 {

ro.mediatek.wlan.p2p=1

# MTK, mtk03034 20110318}

# MTK, mtk03034, 20101213 {

mediatek.wlan.ctia=0

# MTK, mtk03034 20101213}

#

wifi.tethering.interface=ap0

#

ro.opengles.version=131072

wifi.direct.interface=p2p0

dalvik.vm.heapgrowthlimit=128m

dalvik.vm.heapsize=256m

# USB MTP WHQL

ro.sys.usb.mtp.whql.enable=0

# Power off opt in IPO

sys.ipo.pwrdncap=2

# Switching Menu of Mass storage and MTP

ro.sys.usb.storage.type=mtp,mass_storage

# USB BICR function

ro.sys.usb.bicr=yes

# USB Charge only function

ro.sys.usb.charging.only=yes

# audio

ro.camera.sound.forced=0

ro.audio.silent=0

ro.zygote.preload.enable=0

#

# switch bluetooth stack solution

#

ro.btstack=blueangel

#

# ADDITIONAL_BUILD_PROPERTIES

#

persist.gemini.sim_num=2

ro.gemini.smart_sim_switch=false

ro.gemini.smart_3g_switch=1

ril.specific.sm_cause=0

bgw.current3gband=0

ril.external.md=0

ro.btstack=blueangel

ro.sf.hwrotation=0

ril.current.share_modem=2

launcherplus.allappsgrid=2d

curlockscreen=1

ro.mediatek.gemini_support=true

persist.radio.fd.counter=15

persist.radio.fd.off.counter=5

persist.radio.fd.r8.counter=15

persist.radio.fd.off.r8.counter=5

drm.service.enabled=true

fmradio.driver.enable=1

ril.first.md=1

ril.flightmode.poweroffMD=1

ril.telephony.mode=0

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

persist.mtk.anr.mechanism=1

mediatek.wlan.chip=CONSYS_MT6582

mediatek.wlan.module.postfix=_consys_mt6582

ril.radiooff.poweroffMD=0

ro.config.notification_sound=Proxima.ogg

ro.config.alarm_alert=Alarm_Classic.ogg

ro.config.ringtone=Backroad.ogg

persist.mtk.wcn.combo.chipid=-1

ro.fota.oem=MTK_KK

ro.fota.platform=MTK_KK

ro.fota.type=phone

ter.service.enable=0

mediatek.extmd.usbport=0

ro.lte.dc.support=0

ril.active.md=0

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

net.bt.name=Android

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