My question is: where this serial number comes from? Does it burned on flash of device one time during a manufectoring or adb drivers assignes it dynamically or it comes with release that is burned on device? and get this: C:>adb devices List of devices attached HT9CTP820385 device. Link in your question is Iam using a command: adb devices. Device serial number (using ADB commands), It looks like you are confusing two different numbers: adb get-serialno gives you the serial number of the device.