Guide
WhatsApp and click-to-call buttons that convert
How to add call and messaging buttons that turn mobile visitors into conversations: placement, wording, pre-filled messages, opening hours, tracking and what happens next.
VAULT 33|27 · Updated 12 November 2026 · Reviewed 12 November 2026 · 1 min read
Why they work
Many people would rather tap to call or send a quick message than fill in a form, especially on a phone. These buttons capture enquiries that a form alone would lose.
Placement
- In the header on mobile, next to the main action.
- In a slim sticky bar at the bottom of the screen.
- Next to forms, as an alternative.
- On contact and service pages.
Click-to-call
Use a tel: link with the number in international format, such as tel:+447700900000. Show opening hours nearby, and make sure calls outside those hours get a text back. See missed call text-back.
WhatsApp click to chat
WhatsApp's click-to-chat links (https://wa.me/ followed by your number in international format, without a plus sign or spaces) open a chat with you. You can add a pre-filled message:
https://wa.me/447700900000?text=Hi%2C%20I%27d%20like%20a%20quote%20for%20...
A pre-filled message that names the service helps your team reply faster, and lets you see which page the enquiry came from.
Wording
| Weak | Strong |
|---|---|
| Message us on WhatsApp | |
| Phone | Call now, open until 6pm |
| Contact | Get a quick answer |
Track them
Track taps on call and WhatsApp buttons as events, and mark them as possible enquiries. Real enquiries are confirmed when the conversation happens; record those in your CRM with the source.
What happens next
A button is only as good as the reply. Make sure messages are answered quickly by a person or an AI assistant, and that every conversation reaches your CRM. See WhatsApp for business explained.
Sources
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