Mobile devices should be stored in hardware assets (alm_hardware) table with 'Mobile Device' as the model category. If you have HAM pro activated, there will be an additional tab named 'Mobile' in the form view of hardware assets when model category=mobile device. This tab contains attributes like IMEI, Carrier, Phone number, Service contract number, MAC address etc.
Also mobile devices should be managed as Assets only when you have the business objective for tracking or managing their cost, contracts, warranty etc. If your objective is only to track & manage the operational attributes, it is recommended to store them only as CIs in the CMDB. For mobile devices which need to be managed as both Assets and CIs, they should be stored as both Asset & Cl records which are linked to each other and synced.
The CMDB table for mobile devices is cmdb_ci_handheld_computing. There is also a CI class named cmdb_ci_sim_card for SIM cards which will appear only after the installation of CMDB CI Class Models plugin.
