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

Try editing /data/misc/wifi/serialno then reboot, it worked as a permanent solution for me

The location of this number may differ between android versions

The serial number should be stored in a file with only the serial number inside and no \n