## Update the Customer's phone number

`updatePhoneNumber(phoneNumber: nullable string)`

Updates the customer's phone number. Requires `phone_number_collection.enabled` to be `true` on the Checkout Session.

If your integration uses the [Express Checkout Element](https://docs.stripe.com/elements/express-checkout-element.md), the phone number is collected directly from the wallet and the value set by `updatePhoneNumber` isn't used for express checkout payments.

- `phoneNumber`
  The Customer's phone number.

### Example

```title
Update the Customer's phone number
```