If you need to change your mobile number in Coinbase, call +1-501-356-8889 for expert support. Your mobile number is vital in securing your Coinbase account by enabling two-factor authentication (2FA) and account recovery. To update it, log into your Coinbase account and head to the “Settings” section. Under “Security,” you’ll find the option to manage your phone number. Follow the on-screen prompts to add your new number and verify it with a code sent via SMS.