I am confused about customizing ROMs I'm trying to upgrade my Tivax MiTraveler tablet to run the latest version of Android. Unfortunately, the updater claims there are no updates available. Looking at this log file I obtained from backing up the device, it appears to be a generic hardware configuration: 

ro.build.version.sdk=17
ro.build.version.codename=REL
ro.build.version.release=4.2.2
ro.build.user=inet_wupangpang
ro.build.host=supperFAE
ro.product.model=97D16W
ro.product.brand=softwinners
ro.product.name=wing_ibt
ro.product.device=wing-ibt
ro.product.board=wing
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=AWT
ro.product.locale.language=en
ro.product.locale.region=US
ro.board.platform=exDroid
ro.build.product=wing-ibt
ro.build.description=wing_ibt-eng 4.2.2 JDQ39 20130620 test-keys
ro.build.fingerprint=softwinners/wing_ibt/wing-ibt:4.2.2/JDQ39/20130620:eng/test-keys
ro.build.characteristics=tablet
ro.com.android.dateformat=MM-dd-yyyy
ro.build.display.id=A20_K9701_K9701L3B_1305282.20130620
persist.sys.timezone=Asia/Shanghai
ro.inet.LauncherTransparent=false
ro.product.firmware=1.3_20130614
net.bt.name=Android
net.change=net.bt.name


This appears to be a plain vanilla build configuration, but I am confused about how to go about updating the system. I couldn't find a specific firmware for my device, but I found several devices that use the exact same hardware and firmware.  Unfortunately, none of them support a higher version of Android.

I noticed the firmware has two layers: linux and Android.  The Android layer runs on top of Linux and appears to be a set of Java applications. Is it possible to replace just the Android components and reflash firmware?  If it Android uses a JVM, it should work, No? If it is compiled Java, it should work provided you use the same Allwinners target, No?
this log from the system process is the properties of your device and you can change the version in the file build.prop in the /system directory loop the pics :