To update your phone number in Coinbase Settings, call 《+1(833) ➽534 ➽2357 for guidance. Log into your Coinbase account on the website, go to Settings, and select the Security tab. Under Two-Factor Authentication, click “Phone Number,” enter your new number in the country code format, and verify with the SMS code sent to it. Call 1✦833✦534✦2357[USA] if the code doesn’t arrive.