[Miscellaneous Android Development] behtash:
my acer a1-811 with ToolKit Acer Iconia v0.7.7 afer root only bootloping i try write orginal rom my phone now ok and unbrick but ur system.img.gz for this ver Acer_AV052_A1-811_1.072.00_TWN_GEN1 i need system.img.gz for Acer_AV052_A1-811_1.048.00_WW_GEN1

or other way Root from scratch in linux live cd?

system/build.prop:

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=JDQ39

ro.build.display.id=Acer_AV052_A1-811_1.048.00_WW_GEN1

ro.build.version.incremental=1372417559

ro.custom.build.version=1372417559

ro.build.version.sdk=17

ro.build.version.codename=REL

ro.build.version.release=4.2.2

ro.build.date=Fri Jun 28 19:54:29 CST 2013

ro.build.date.utc=1372420469

ro.build.type=user

ro.build.user=pandora

ro.build.host=pandora01

ro.build.tags=release-keys

ro.build.sku=WW_GEN1

ro.product.model=A1-811

ro.product.brand=acer

ro.product.name=a1-811_ww_gen1

ro.product.device=mango

ro.product.board=a1-811_ww_gen1

ro.product.id=Mango

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=Acer

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# ro.build.product is obsolete; use ro.product.device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

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

ro.build.description=a1-811_ww_gen1-user 4.2.2 JDQ39 1372417559 release-keys

ro.build.fingerprint=acer/a1-811_ww_gen1/mango:4.2.2/JDQ39/1372417559:user/release-keys

ro.build.flavor=

ro.build.characteristics=tablet

# end build properties

# begin mediatek build properties

ro.mediatek.version.release=ALPS.JB2.MP.V1.3

ro.mediatek.platform=MT6589

ro.mediatek.chip_ver=S01

ro.mediatek.version.branch=ALPS.JB2.MP

ro.mediatek.version.sdk=1

# end mediatek build properties

#

# 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}

ro.sf.lcd_density=160

#

wifi.tethering.interface=ap0

#

ro.opengles.version=131072

wifi.direct.interface=p2p0

dalvik.vm.heapgrowthlimit=96m

dalvik.vm.heapsize=128m

# USB MTP WHQL

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

# Power off opt in IPO

sys.ipo.pwrdncap=2

ro.sys.usb.storage.type=mtp

# USB BICR function

ro.sys.usb.bicr=no

# USB Charge only function

ro.sys.usb.charging.only=no

# audio

ro.camera.sound.forced=0

ro.audio.silent=0

#ipo

sys.ipo.tbl=1

ro.zygote.preload.enable=0

ro.dinfo.version=1.0

ro.cpu.vendor=MTK

ro.cpu.speed=1.2 GHz

ro.cpu.version=MT8389W

ro.ram.size=1024MB

#

# ADDITIONAL_BUILD_PROPERTIES

#

ril.specific.sm_cause=1

ril.external.md=0

fmradio.driver.chip=3

ro.sf.hwrotation=0

ril.current.share_modem=1

launcherplus.allappsgrid=2d

launcher2.allappsgrid=3d_20

curlockscreen=1

ro.mediatek.gemini_support=false

persist.radio.fd.counter=15

persist.radio.fd.off.counter=5

persist.radio.fd.r8.counter=15

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

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

drm.service.enabled=true

fmradio.driver.enable=0

ril.first.md=1

ril.flightmode.poweroffMD=1

ril.telephony.mode=1

ril.radiooff.poweroffMD=0

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

mediatek.wlan.chip=MT6628

mediatek.wlan.module.postfix=_mt6628

ro.config.notification_sound=Proxima.ogg

ro.config.alarm_alert=Alarm_Classic.ogg

ro.config.ringtone=Backroad.ogg

ro.build.pandora.id=Acer_AV052_A1-811_RV01RC11_WW_GEN1

ro.build.img_pn.id=FM.NLXA0.01Y

ro.error.receiver.system.apps=com.acer.android.acernidus

ro.com.google.clientidbase=android-acer

ro.com.google.clientidbase.yt=android-acer

ro.com.google.clientidbase.ms=android-acer

ro.com.google.clientidbase.am=android-acer

ro.com.google.clientidbase.gmm=android-acer

ro.carrier=3g

ro.network.type=3g

ro.com.google.gmsversion=4.2_r2

net.bt.name=Android

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