[Android Head-Units] KID52:
I've taken the unit out of my car again so I can hopefully get any required information and do some tests.

Installed a terminal emulator and tried to access the system/apps folder, but as mentioned above, permission is denied, also tried using su for the hell of it but the user isn't even allowed to use su, let alone try to enter a password.

Installed the Bluetooth app, and it opens the Bluetooth menu, but as soon as you turn Bluetooth on, it automatically turns off! The icon appears for a split second in the notification bar. I have tried this whilst having my phone connected to the phone app, and also with a USB Bluetooth dongle attached, same thing happens no matter the circumstances, and phone does not lose connection.

To confirm compatibility regarding 3G dongles, I have now tried two, the first was one of those cheap black and orange ones that usually appear under any search for a 3G dongle, this did not work. The second is a generic white dongle (doesn't help much I know), that says "Model: MF 190" on the back. It looks to be a clone of the ZTE MF190 dongle.

So, if there is anything I can try to get this thing rooted, or anything someone wants me to test out, even just to see if an app runs, please let me know.

For those interested, build.prop

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=JRO03C

ro.build.display.id=full_mstarcedric3-userdebug 4.1.1 JRO03C V1.0.1.0 test-keys

ro.build.version.incremental=V1.0.1.0

ro.build.version.sdk=16

ro.build.version.codename=REL

ro.build.version.release=4.1.1

ro.build.date=2013年 10月 31日 星期四 02:17:11 CST

ro.build.date.utc=1383157031

ro.build.type=userdebug

ro.build.user=john

ro.build.host=john

ro.build.tags=test-keys

ro.product.model=Full AOSP on MStar Cedric3

ro.product.brand=Mstar

ro.product.name=full_mstarcedric3

ro.product.device=mstarcedric3

ro.product.board=

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=MStar Semiconductor, Inc.

ro.product.locale.language=en

ro.product.locale.region=US

ro.wifi.channels=

ro.board.platform=cedric

# ro.build.product is obsolete; use ro.product.device

ro.build.product=mstarcedric3

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

ro.build.description=full_mstarcedric3-userdebug 4.1.1 JRO03C V1.0.1.0 test-keys

ro.build.fingerprint=Mstar/full_mstarcedric3/mstarcedric3:4.1.1/JRO03C/V1.0.1.0:userdebug/test-keys

ro.build.characteristics=nosdcard

# end build properties

ms.mstplayer=1

ms.mstplayer.logless=1

hw.ms.display.destination=3

hw.ms.sc1_sync_sc0=1

hw.ms.hdmitx_timing=480_60P

hw.ms.hdmitx_color=YUV

ro.ms.System.bDualScreen=true

debug.sf.electron_frames=1

ms.subchannel.audio=1

hw.ms.sytem.audio=0

persist.service.adb.enable=0

#

# ADDITIONAL_BUILD_PROPERTIES

#

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

ro.config.ringtone=Ring_Synth_04.ogg

ro.config.notification_sound=pixiedust.ogg

ro.carrier=unknown

ro.config.alarm_alert=Alarm_Classic.ogg

ro.sf.lcd_density=160

qemu.sf.lcd_density=160

dalvik.vm.heapsize=128m

ro.opengles.version=131072

mstar.mstplayer.bd=1

wifi.interface=wlan0

wifi.supplicant_scan_interval=15

dalvik.vm.lockprof.threshold=500

net.bt.name=Android

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