# Request phone number change for authenticated user

Step 1. Request an authentication code to be sent via SMS to the user's original phone number.

Endpoint: PUT /api/v1/accounts/phone/change/request
Version: 1.0
Security: header

## Response 400 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation

## Response 401 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation