Sprint requires that all new customers create a PIN (personal identification number) when setting up a new account. You'll need your PIN whenever you call Sprint or visit a Sprint retail store. You'll create your account PIN now.
Your PIN can be any combination of 6 to 10 digits, except all zeroes.
Best Buy will provide this information to Sprint, and will not store or maintain your PIN. Remember to keep your PIN private. You can view and modify your PIN anytime by signing on to Sprint.com and going to Settings and Passwords.