Same serial number on several android devices. Adb is useless. How can I change the serial number?

Question

I bought a lot (500+) cheap China tablet with AllWinner processor and Android 4.0.3. All tablets expose the same serial number. I can\'t deploy my application simultaneously

Answer 1

build number etc by editing the 'build.prop' file in /system. The serial number can be changed by adding the property 'ro.serialno=' to build.prop file