What This Covers

Everything you need to register your business with carriers so your texts get delivered and your calls don't get flagged as spam: A2P SMS registration (required to send text messages), and Voice Integrity and CNAM registration (improve call answer rates and stop your number from showing up as "Spam Risk"). All three live in the same place in STRINGConnect: Settings → Phone System → Trust Center.

Part 1: A2P SMS Registration

Overview

Before your practice can send text messages (appointment confirmations, reminders, and the like) through your platform, US carriers require you to register your business and your messaging "use case." This is called A2P (application-to-person) registration. It applies to both standard 10-digit local numbers and toll-free numbers.

This step is not optional. Until your number is verified, carriers will block or filter your texts, so your appointment reminders may never reach clients. Registrations are reviewed by the carriers, not by us, and they reject anything that looks inconsistent or unclear.

The good news: almost every rejection comes from a small set of fixable mistakes. Follow this guide and you will likely pass on the first submission.

Before You Begin

Have these ready before you open the registration form:

• Your legal business name and business type/industry
• Your EIN (Employer Identification Number) or tax ID — you can upload your CP-EIN document to auto-fill several fields
• Your business address, email (at your business domain — not Gmail or Yahoo), and phone number
• The name and contact information of your authorized representative (typically the owner, founder, or CEO)
• A callback phone number that is different from the number you are registering
• A live, public website (no "coming soon" page, no password wall) with a Terms of Service, Privacy Policy, and your business contact information visible
• A working contact or booking form that includes an SMS consent checkbox (see the opt-in section below)
• A decision on your use case: are you sending appointment notifications only, or also marketing and promotions?

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Navigating to the Registration Form