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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 on several devices (with a USB hub) using ADB.EXE because it can't distinguish them.
I'm thinking about a pre-deploy process that change the internal serial number, is it possible? Where is the serial number stored?
Note: tablets are rooted
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They are unique. It is not possible for more than one phone to have the same serial number.
Verizon explains that the 15-digit number is a bit different from your serial number in that an IMEI number is unique across all smartphones, while serial numbers are used by individual manufacturers.
In the device's system settings: Settings->System->About Tablet->Model->Serial number. On the device's retail packaging. The device's serial number can be found on the back of the box. On the device's back cover.
In android go to Settings > Applications > Development and tap on Device Hostname. You can then change the name and it should show up when attached to adb.
You need to populate /sys/class/android_usb/android0/iSerial sysfs file with unique values for every device. Most vendors do it with custom init script, which would read the value from a persistent system property or a regular file and put it in sysfs on every power up.
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