One of the most common worries when moving to WhatsApp Business API is onboarding: "Do I have to fight Meta's console? Will I lose my number? Will I lose my chats?". The short answer is no — if it's done with the right process. Here we explain the two key pieces (Embedded Signup and Coexistence) and the step-by-step registration.
The "sign-in": what Embedded Signup is
Embedded Signup is Meta's official flow to connect your WhatsApp Business Account (WABA) to a technology provider, through a guided sign-in with your Meta business account. Instead of navigating the maze of Business Manager and Meta for Developers by hand, you click a button ("Connect your WhatsApp"), a Meta window opens, you sign in, select or create your WABA and number, and authorize — all in one flow.
For the business it means: you onboard your WhatsApp API in minutes, without touching code or technical configuration. The account stays in your name (you own the WABA), and the provider —in our case, as a Meta Tech Provider— is authorized to operate and build on top of it.
Coexistence: using the app and the API at the same time
Here's fear #1: "if I migrate to the API, do I lose the WhatsApp Business app I already use?".
The answer is Coexistence, a Meta feature that lets the same number operate with the WhatsApp Business app and the official API at the same time. During the transition:
- Your team keeps serving from the app on the phone, as always.
- The API runs in parallel for the bot, template broadcasts, integrations and metrics.
- You don't lose your number or your recent conversation history.
Coexistence makes the migration phased and without downtime: there's no day when support "goes dark." It's the difference between a risky migration and a calm one.
The step-by-step process to register your number
This is the full path to onboarding WhatsApp Business API. We automate it with Embedded Signup, but it helps to know the pieces:
- Business Verification. Meta confirms your company is real and legal, inside your Meta Business Manager. It's a requirement for advanced access.
- Create or connect your WABA. The WhatsApp Business Account is the "container" for your numbers, templates and configuration.
- Add and verify the number (or migrate the one you already use). If you come from the app, Coexistence kicks in here.
- Display name. Meta reviews and approves the name you'll appear under.
- Message templates. Proactive messages (marketing, utility, authentication) are sent with templates that Meta approves. They're created and submitted for review.
- Webhooks and token. Your number is connected to the platform that receives and replies to messages, with a secure access token.
- Live. Your WhatsApp operation becomes measurable and compliant.
How we automate it (and why it matters)
Doing this "by hand" is where most people get stuck: verifications that bounce, rejected names, miscategorized templates, webhooks that don't respond. As a Meta Tech Provider with our own approved app, at iTechDev we have Embedded Signup configured so your onboarding is a matter of minutes, and we handle the technical part: verification, WABA, number (with Coexistence if you migrate), approved templates and webhooks in production.
And once connected, the good part begins: integrating your WhatsApp with your ERP/CRM (Odoo, Dynamics, Salesforce) and building the AI bot. Onboarding is just the beginning.
In summary
- Embedded Signup is the sign-in that connects your WhatsApp to the API in minutes, with the account in your name.
- Coexistence lets you use the app and the API at once — you migrate without losing your number or continuity.
- The process has 7 steps (verification, WABA, number, name, templates, webhooks, live) that we automate.
Ready to onboard your WhatsApp Business API without headaches? Book a free assessment or explore the full WhatsApp Business API service. Want to estimate your message cost first? Use the calculator.