What causes the nondelivery of my messages?
Modified on: Tue, 9 Jun, 2020 at 2:34 PM
Having an SMS termination failure may occur for various reasons:
Incorrect number formats, missing international codes, and mis-typed numbers.
Numbers do not exist or have expired.
Receiving network is overloaded.
Receiving network failure.
Receiving phones are switched off
Inbox of receiving phones are full.
Not supporting a DLR feature.
Sender ID is not registered [For destinations that require Sender ID registration].
SMS content is restricted over this Network/ Route Type.
The account is facing credit issues (for pre-paid accounts only).
Terminating messages to restricted networks/countries.
The SMS length is invalid or noncompatible with the interface.
Success Ratio =
Number of Delivered SMS Attempts x100
Number of All SMS Attempts
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