The A2P 10DLC (Application-to-Person 10-Digit Long Code) service for SMS & MMS has been launched by Verizon, marking the first carrier to do so. The ecosystem is expected to undergo significant changes as more carriers adopt the service, including routes and registration processes. Carriers are creating 10-digit long code routes specifically for A2P traffic to improve deliverability and throughput while protecting end users from spam and unwanted messages. Businesses will need to register their brand and campaigns with the carrier networks to build trust and gain better deliverability. The registration process involves providing specific information about brands or campaigns, which will be assigned a Trust Score based on risk level. Twilio has built a Trust Hub to simplify the process of getting verified and earning trust with carriers. As the ecosystem converges on standards for A2P 10DLC routes and registration, businesses should develop a messaging strategy that accommodates all carrier needs.