What is 10DLC\n\nUS carriers require all A2P SMS senders to register their brand and use cases. Without it, messages get filtered.\n\n## How to register\n\nSettings → Messaging Compliance. Submit your brand info and campaign use case. Approval usually takes 1–3 business days.\n\n## TCPA\n\nAlways collect opt-in consent and honor STOP. Wundertre handles STOP/HELP automatically.
