text: When you send SMS, you may find different status codes, below table will help you understand these status’s in detail.
  Status | Reason |
  DELIVRD | successfully delivered to handset |
  AWAITED-DLR | SMS has been submitted to operator, and reports are awaited |
  pending | SMS is in SMS Alert’s queue and shall be processed on scheduled time |
  BLACKLST | the subscriber is in SMS Alert’s Blacklist |
  ABSENT-SUB | the subscriber is either switched off or out of network coverage area |
  BARRED | SMS services are barred for this subscriber |
  INVALID-SUB | the subscriber is either invalid or does not exists |
  NETWRK-ERR | there is some temporary error in receiving/subscribers operator |
  DNDNUMB | the subscriber is registered in do not disturb registry |
  DEFERRED | SMS delivery has been delayed and shall be retried later |
  MEMEXEC | the subscriber does not have SMS storage space in handset |
  CONGESTION | there is some temporary network congestion in between sender and receivers operator |
  NO-DLR-OPTR | Actual delivery report was not received from the operator within the set time duration |
  There could be more error codes, as we add them time to time, as technology enhances.