Topic guide
SMS
Every glossary term attached to SMS, with the one-line answer for each.
A2P 10DLCLearn who needs A2P 10DLC, what Brand and Campaign registration asks for, how fees are shaped, and when another US messaging route fits better.CTIA Messaging PrinciplesVoluntary CTIA messaging guidance and opt-out expectations.Express written consentConsent scope and recordkeeping boundaries.SMS opt-inSMS permission scope and records.SMS opt-outSMS opt-out handling and reasonable revocation methods.SMS quiet hoursRecipient-local-time boundaries in the cited US provision.TCPATCPA scope and consent boundaries for covered messaging.Toll-free verificationTwilio US and Canada toll-free verification scope.
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