问题
My question is in subject: when we read /proc/cpuinfo virtual file on Android, it contains Serial field. What is the value? Is it the same for all devices that use the same CPU model, or it is unique for each CPU instance?
I have GT-I9500 (Samsung Galaxy S4) phone, and its serial last 8 characters are 4d00a804 (revision is 000a). Maybe anyone can write his last 8 characters for the same model to check if they are unique?
回答1:
Serial is some number optionally passed by the bootloader and has nothing to do with the CPU. If set, the kernel treats it as unique for the device.
I have several devices with unset serial number (0000000000000000) and ARM64 and non-ARM devices do not have Serial at all.
来源：https://stackoverflow.com/questions/29560841/is-serial-field-in-proc-cpuinfo-unique-for-each-android-device