最近遇到几款简单学习网学习平板要刷成普通的平板，简单学习网学习平板分很多种，常见的型号有 s803-jd n803-jd s806-jd s808-jd。这几种平板的配置硬件都不相同，不能乱刷，改成普通平板之后可以正常安装app，usb调试也是打开的，改之前的学习平板禁用usb调试，禁止传输文件的管控系统

下面是n803-jd修改之前的开机桌面

改成普通安卓之后

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=KOT49H
ro.build.display.id=ALPS.KK1.MP1.V2.29
ro.build.version.incremental=eng.luhy2.1434693170
ro.custom.build.version=N803-JD
ro.build.version.sdk=19
ro.build.version.codename=REL
ro.build.version.release=4.4.2
ro.build.date=Fri Jun 19 13:56:38 CST 2015
ro.build.date.utc=1434693398
ro.build.type=user
ro.build.user=luhy2
ro.build.host=ser
ro.build.tags=test-keys
ro.product.model=N803-JD
ro.product.brand=简单学习网
ro.product.name=N803-JD
ro.product.board=N803-JD
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=alps
ro.product.locale.language=zh
ro.product.locale.region=CN
ro.wifi.channels=
ro.board.platform=
# ro.build.product is obsolete; use ro.product.device
ro.build.product=N803-JD
# Do not try to parse ro.build.description or .fingerprint
ro.build.description= KOT49H eng.luhy2.1434693170 test-keys
ro.build.fingerprint=简单学习网
ro.build.flavor=
ro.build.characteristics=tablet
# end build properties

# begin mediatek build properties
ro.mediatek.version.release=ALPS.KK1.MP1.V2.29
ro.mediatek.platform=MT6592
ro.mediatek.chip_ver=S01
ro.mediatek.version.branch=KK1.MP1
ro.mediatek.version.sdk=2
# end mediatek build properties
#
# from out/target/product/e202_qch_31/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

ro.sf.lcd_density=240

ro.internalsd.name=N803-JD

ro.product.device=N803-JD

persist.sys.timezone=Asia/Shanghai
#
# ADDITIONAL_BUILD_PROPERTIES
#
persist.gemini.sim_num=1
ro.gemini.smart_sim_switch=false
ro.gemini.smart_3g_switch=0
ril.specific.sm_cause=0
bgw.current3gband=0
ril.external.md=0
ro.btstack=blueangel
ro.sf.hwrotation=0
ril.current.share_modem=1
launcherplus.allappsgrid=2d
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
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