The Value of E.164 Formatting
Incorrect number formatting frequently leads to parsing failures when sending international SMS messages; E.164 is the globally recognized standard for phone numbers.
Key Standardization Practices
1. Number Normalization Rules
‑ Ensure numbers begin with the country code; remove extraneous characters such as leading zeros, spaces, parentheses, and hyphens.
‑ Perform validation at the application entry point; do not rely on the platform to correct "dirty" data.
2. Logging and Testing Methods
‑ Log numbers with formatting anomalies to facilitate tracking and troubleshooting.
‑ Prepare test numbers from various countries to verify the effectiveness of number processing logic.
Intercepting invalid numbers at the application layer reduces the waste of API resources and minimizes the time spent troubleshooting. Validating logic during the development phase ensures the stability of production operations.