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# How can I automatically set my user's phone number?

Articles on: [Developers](/en/category/developers-12l9l8o/)

If you are using Crisp on a website where users are authenticated, you may want to set their phone number.  
  
This method uses the Crisp JavaScript API, that you can call from your own code.  
  

``` // Feed this call with your own custom data. $crisp.push(["set", "user:phone", ["0123456789"]])```

  
  
Want to know more about the $crisp interface? Read: [How to use $crisp Javascript SDK?](https://docs.crisp.chat/guides/chatbox-sdks/web-sdk/dollar-crisp/)

Updated on: 13/03/2024