Device IDs based on GSM IMEI

Device IDs can be derived from a GSM IMEI address which consists of 14 decimal digits plus a check digit. The check digit is not officially part of IMEI. However, since modems commonly report the IMEI including check digit and it is typically listed on labels, the check digit is included in the device ID mapping.

Example IMEI: AA-BBBBBB-CCCCCC-D
Device ID mapping: 00010000-00000000-0AABBBBB-BCCCCCCD