typedef enum {
  VM_GSM_SMS_ACTION_NONE,
  VM_GSM_SMS_ACTION_SEND,
  VM_GSM_SMS_ACTION_READ,
  VM_GSM_SMS_ACTION_DELETE,
  VM_GSM_SMS_ACTION_SAVE,
  VM_GSM_SMS_ACTION_UPDATE,
  VM_GSM_SMS_ACTION_COPY,
  VM_GSM_SMS_ACTION_MOVE,
  VM_GSM_SMS_ACTION_QUERY,
  VM_GSM_SMS_ACTION_CHANGE_STATUS,
  VM_GSM_SMS_ACTION_MOVE_TO_ARCHIVE,
  VM_GSM_SMS_ACTION_GET_CONTENT,
  VM_GSM_SMS_ACTION_GET_SIM_NUMBER,
  VM_GSM_SMS_ACTION_GET_CENTER_ADDRESS
} VM_GSM_SMS_ACTION;