voluptasmollitia/docs-exp/auth.updatephonenumber.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/auth](./auth.md) &gt; [updatePhoneNumber](./auth.updatephonenumber.md)

## updatePhoneNumber() function

Updates the user's phone number.

<b>Signature:</b>

```typescript
export declare function updatePhoneNumber(user: User, credential: PhoneAuthCredential): Promise<void>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  user | [User](./auth.user.md) | The user. |
|  credential | [PhoneAuthCredential](./auth.phoneauthcredential.md) | A credential authenticating the new phone number. |

<b>Returns:</b>

Promise&lt;void&gt;

## Example


```
// 'recaptcha-container' is the ID of an element in the DOM.
const applicationVerifier = new RecaptchaVerifier('recaptcha-container');
const provider = new PhoneAuthProvider(auth);
const verificationId = await provider.verifyPhoneNumber('+16505550101', applicationVerifier);
// Obtain the verificationCode from the user.
const phoneCredential = PhoneAuthProvider.credential(verificationId, verificationCode);
await updatePhoneNumber(user, phoneCredential);

```