Enter your Security Code, a. Last 4 Digits of the Primary Cardholder's SSN. Contact us by phone. 1-888-574-1301. Best Buy Credit Card: Registration - Citi.com

: Choose a unique User ID (5–50 characters) and Password (8–64 characters) .

: Follow the remaining prompts to set up security questions and paperless preferences . Card Activation

Note: Your password must include at least one uppercase letter, one lowercase letter, one number, and one special character .

To register your Best Buy credit card for online access, visit the on the Citibank website . This process creates your online account, allowing you to pay bills, view statements, and manage rewards . Online Registration Steps

Last 4 digits of the primary cardholder's (SSN) .