void custom_sms_get_inbox_message_id(void)
{
    VMINT16 message_id = 0;
    message_id = vm_gsm_sms_get_message_id(VM_GSM_SMS_BOX_INBOX, 0);
    if(message_id < 0)
    {
        vm_log_debug("The inbox message id of the message_index 0 does not exist");
    }
}