Account PINs are used  to declare yourself as the account owner for your Sprint account, whether you  are on your online profile or calling Care. Here are some  tips:

• Your account PIN needs to be something not easily guessed such as sequential, repeating or patterned number.
• PINs should not be  shared with others. If someone needs to access your account online, you can grant them profile permissions to do so on My Sprint/ My Preferences/Limits and  Permissions.
• PINs, like passwords, should not be written down.

You can change  your PIN to make it more secure. Go to to My Sprint/My Preferences/ My Account  PIN.  Here you can update your PIN and Security Question/Answer.  You must have  already entered your PIN in your profile to see this link.