Multi-IMSI M2M SIM
Our SIM software supports automatic backup-mobile-subscription (IMSI) for improved connectivity in regions where mobile network coverage is difficult. Backup IMSI can be pre-loaded on a SIM while at the personalization stage or right at the production stage. Alternative new subscriptions and can be loaded remotely, at any time via Over The Air (OTA) protocol.
Several “base” subscriptions can be stored on a SIM. Preferred network list is configured to define which IMSI will be used for each MCC/MNC combination as a default subscription and, if required, any other available IMSI can be used as a backup.
IMSI fallback logic
In case if any IMSI cannot register in the network SIM applet will automatically switch to an alternative backup IMSI. No communication to the network provider is required, SIM software has full control of this task. While on a backup IMSI, applet will use USSD protocol to ask backend servers if SIM should stay on a backup or try to reload the base subscription.
Remote (OTA) execution of “SIM Refresh”
When network registration process hangs or some of the services are not functioning there is a way to initiate the SIM refresh procedure on a remote device. This helps to resolve problems that till now were only possible to recover by initiating hardware restart.
Cell-ID location API command
An alternative option to get geo-location of the SIM card based on the GSM network data. Just in case device has faulty GPS/GLONASS module or it is located in a spot where GSM coverage is the only available option, like for instance, underground mines, tunnels, subways or similar.
Industry specific software design
Along with the above-mentioned features, our SIM software is limiting some UI functions that are not being used in the M2M/IoT devices, while commonly trigger problems to such. Features like ‘SIM Menu’, ‘Display text’ and similar are commonly available on generic SIM cards. However, M2M devices do not imply any customer interaction and, as a result, unknown command execution may lead to hanging up the M2M device software. Top Connect M2M/IoT SIM card software simply prevent these kind of problems from happening!