Code review comment for lp:~ev/whoopsie/android-serial

For devices that have sim card capability, they also have IMEI number assigned (world-wide unique across all devices), which is used by SIM cards when authenticating with 3G and GSM networks. It's used to blacklist stolen devices and make them essentially bricks (well, not able to authenticate with 3G/GSM). Thus if available that should be used to uniquely identify the device in-additionto/instead of proposed methods. IMEI is also android independant and portable between all devices that have sim cards (Eg. laptops with sim cards).

Ubuntu System Settings already has methods to fetch IMEI number.