The following are the different SMS delivery statuses with their descriptions:


Status
Description
NO-CREDITS
Insufficient credits.
SERIES-BLOCK
Mobile number series blocked.
INV-NUMBER
Invalid number.
SERVER-ERR
Server error
SPAM
Spam SMS
SNDRID-NOT-ALLOTED
Sender ID not allocated.
BLACKLIST
Blacklisted number
TEMPLATE-NOT-FOUND
Template not mapped.
INV-TEMPLATE-MATCH
Template not matching approved text.
SENDER-ID-NOT-FOUND
Sender ID not found.
DNDNUMB
DND registered number.
NOT-OPTIN
Not subscribed for opt-in group.
TIME-OUT-PROM
Time out for promotional SMS.
DELIVRD
SMS successfully delivered.
INVALID-SUB
Number does not exist. / Failed to locate the number in HLR database.
ABSENT-SUB
Telecom services not providing service for the particular number. / Mobile Subscriber not reachable.
HANDSET-ERR
Problem with Handset or handset failed to get the complete message. / Handset doesn’t support the incoming messages.
BARRED
End user has enabled message barring system. / Subscriber only accepts messages from Closed User Group [CUG].
NET-ERR
Subscriber’s operator not supported. / Gateway mobile switching error.
MEMEXEC
Handset memory full.
FAILED
SMS expired due to roaming limitation. / Failed to process the message at operator level.
MOB-OFF
Mobile handset in switched off mode.
HANDSET-BUSY
Subscriber is in busy condition.
SERIES-BLK
Series blocked by the operator.
EXPIRED
SMS expired after multiple re-try.
REJECTED
SMS Rejected as the number is blacklisted by operator.
OUTPUT-REJ
Unsubscribed from the group.
REJECTED-MULTIPART
Validation fail [SMS over 160 characters]
UNDELIV
Failed due to network errors.
NO-DLR-OPTR
In case operator has not acknowledged on status report of the SMS.