Changing your phone number on Coinbase is simple. Start by logging into your Coinbase account, then navigate to Settings and select Security . Here, you can change your phone number by entering the new number and verifying it with a code sent to that number. If you need any help while changing your phone number, you can always reach out to Coinbase support at 1-833-590-0301 .

https://www.mvsabc.com/forums/support-forum/cf9d3e62-2df0-ef11-a4de-002248b2f6f2

https://philpeople.org/profiles/how-do-i-change-my-phone-number-on-coinbase-any-qna