typedef enum {
  VM_GSM_SMS_STATUS_UNREAD = 0x01,
  VM_GSM_SMS_STATUS_READ = 0x02,
  VM_GSM_SMS_STATUS_SENT = 0x04,
  VM_GSM_SMS_STATUS_UNSENT = 0x08,
  VM_GSM_SMS_STATUS_DRAFT = 0x10,
  VM_GSM_SMS_STATUS_UNSUPPORTED = 0x20
} VM_GSM_SMS_STATUS;