SMS Notice Guidelines
Framework for carrier review, notice length, required disclosures, submission timing, and reporting.
Advance submission
Add the approved lead-time requirements for long-code and short-code notice campaigns.
Message length and segmentation
Explain GSM-7 and Unicode segmentation, with special attention to Spanish-language character expansion and carrier limitations.
Required documentation
List the notice order, approved language, data source, opt-out language, support contact, and any carrier-specific documentation.