---
title: Click2Call not working for “Alternative Phone Number” field
description: "Earlier, for Click2Call, the \"CustomerNumber\" parameter was mail-merged in the Click2Call URL. Because of this, users were able to initiate Click2Call from both the Phone Number field and the Alternative Phone Number field. However, the ..."
url: "https://supportb.kinsta.cloud/docs/click2call/"
updated: "2025-12-30"
category: Account Details_Master Folder
---

# Click2Call not working for “Alternative Phone Number” field

Earlier, for **Click2Call**, the **"**`CustomerNumber"` parameter was mail-merged in the Click2Call URL. Because of this, users were able to initiate Click2Call from both the **Phone Number** field and the **Alternative Phone Number** field.

However, the **"**`CustomerNumber"` parameter has now been **deprecated**.

**Problem Statement:**
The **Lead’s Phone** field was mail-merged in the Click2Call URL. Due to this, the customer was unable to perform Click2Call using the **Alternative Phone Number** field, and it resulted in an **Invalid Number** error.
![](https://desk.zoho.in/galleryDocuments/edbsn5c5730cc33c262b78f2e54991af4505d6b034b9d21eb8f4575f065ae82b43bcee45b4ba1fb8ba6fe69e9dda3f20c04c64c6bf09c6d6f44466f79363dc4a85789)

**Solution:**
The alternative parameters that can be used instead of ***"***`CustomerNumber"` are:

- `@leadPhone` – Lead phone number **without country code**
- `@PhoneNumberWithCountryCode` – Lead phone number **with country code**

Using the above parameters will resolve the issue and allow Click2Call to work as expected.