Can I use one WhatsApp number for the app and API?
Yes. You have two legitimate paths: coexistence, where the WhatsApp Business app and the WhatsApp Business API run side by side on the same number, or a full migration that moves the number entirely onto the API. You do not need to buy a fresh number, print new cards, or update your storefront and Google listing. The right choice depends on how your team already handles chats today and how much you want to automate — and both paths keep your existing chat history intact when set up correctly.
Quick answer
One number can serve both the WhatsApp Business app and the API. Coexistence keeps the app for manual replies while the API adds automation, notifications and templates on the same number. Full migration moves the number entirely to the API. No new number needed either way — InfiQ handles the switch and keeps your BSUID account ownership with you.Coexistence: keep the app, add the API on top
Coexistence is Meta's mode for businesses that still want the phone-based WhatsApp Business app for day-to-day manual replies but also want the automation, broadcast and template messaging the API unlocks — all on the same phone number. Your staff keep chatting from the app on their handset exactly as before, while InfiQ connects the API to the identical number so campaigns, order updates and chatbot flows run in parallel. Recent chats sync across both surfaces, so a customer conversation started in the app is visible to your automated flows and shared team inbox. This is the gentlest path: nothing about your customer-facing number changes, and your team is not forced to abandon a workflow they already trust.
- Both the app and the API stay live on one number
- Existing recent chats sync across app and API
- Best when staff still reply manually from the phone
- Automation, templates and broadcasts get added without disruption
- No 30-day handset lockout of the kind full migration involves
Full migration: move the number entirely to the API
Full migration takes your number off the standalone WhatsApp Business app and registers it purely on the API through a Business Solution Provider like InfiQ. After migration the number no longer works in the phone app — every conversation flows through your API-connected platform and shared team inbox instead. This is the right call when you have outgrown the single-phone app: multiple agents need to answer the same number, you want a proper ticketing and routing layer, and you rely on automated notifications at volume. Migration preserves your verified business name and, done properly, your chat history, so customers never notice a seam. The trade-off is that the classic app experience on that handset goes away, which is exactly the point for teams that have moved past it.
- The number leaves the phone app and lives only on the API
- Enables many agents on one number via a shared inbox
- Verified business name and display name carry over
- Best for higher volume, routing and automation needs
How to choose between the two
Ask one question first: does your team still want to tap out replies from the WhatsApp Business app on a phone? If yes, coexistence lets you keep that habit while layering automation on top — ideal for a small team dipping into broadcasts and order alerts. If your growth has made the single-handset app a bottleneck — you need several people answering at once, CRM sync, auto-replies and analytics — full migration is cleaner because everything then lives in one API-driven system. Many InfiQ customers start with coexistence to test the waters and migrate fully once automation becomes their default. There is no wrong door, and switching later is straightforward; the number and your audience stay the same throughout.
What stays the same either way (and what it costs)
Whichever path you pick, three things hold steady. First, your number: no rebranding, no reprinting, no lost saved contacts on the customer's side. Second, your account ownership: InfiQ is an official Meta Business Partner and sets you up so the WhatsApp Business Account and its BSUID stay under your control, not locked inside a reseller. Third, the billing model: WhatsApp charges per delivered message by category — marketing, utility or authentication — since Meta moved off per-conversation billing on 1 July 2025. The 24-hour window is a free service window for replying to customers, not a billing unit. InfiQ applies its own platform pricing shown as transparent ₹ pricing (ex-GST), so you can forecast spend clearly before you send a single template.
- Same number, verified name and audience
- BSUID account ownership stays with your business
- Billed per delivered message by category, not per conversation
- 24-hour service window remains free for customer replies
- Transparent ₹ pricing (ex-GST)
InfiQ vs Full migration
| InfiQ | Full migration | |
|---|---|---|
| Same number | Yes | Yes |
| WhatsApp Business app still usable | Yes, on the same number | No — number leaves the app |
| Automation, templates, broadcasts | Yes, added alongside the app | Yes, the only surface |
| Multiple agents on one number | Limited | Yes, via shared inbox |
| Recent chat history | Syncs across app and API | Preserved on migration |
| Best for | Teams still replying from the phone | Higher volume and routing |
Frequently asked questions
Do I need a brand-new phone number to use the WhatsApp Business API?+
Will I lose my chat history when I connect the API?+
What is the difference between coexistence and full migration?+
Can multiple team members answer the same number after migrating?+
Can I start with coexistence and move to full migration later?+
Does using one number for both change how I'm billed?+
Who owns the WhatsApp Business Account after InfiQ sets it up?+
Will customers notice anything different after the switch?+
Bring your existing number onto the API
Talk to InfiQ, an official Meta Business Partner, and we'll set up coexistence or a full migration on your current number — with your BSUID account ownership and transparent ₹ pricing from day one.