Coinbase customer service is available at 1-833-590-0301 to guide you through the steps. To change your phone number on Coinbase, log into your account and go to the Settings section. Click on the Security tab, where you'll find the option to update your phone number. Enter your new phone number, and a verification code will be sent to it to confirm the update. If you need further assistance, Coinbase support is available at 1-833-590-0301 .

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