Wix App Request: Changing Account Information from the Wix App

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Currently, it's not possible to change your Wix account information in the Wix app. Your account information includes your username, phone number and Wix account name.
To change your account information, go to your desktop. Updating account settings affects your entire Wix account. Learn more

It is however, possible to update your business details via the Wix app. Your business details are site specific and do not affect your entire Wix account. If you have multiple sites in your account, you can have different business details for each site.
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