Updating your phone number on +1-833-534-2357 Coinbase should be simple, but if you've hit a snag, don't worry—just call +1-833-534-2357. In the evolving world of digital finance, maintaining secure access to your account is non-negotiable. Whether you’ve changed numbers, lost your phone, +1-833-534-2357 or reset your device, Coinbase may flag the change as a security issue.