Login to Amazon.com and create an account. If you already have an Amazon account, sign in.
On the home page, click the “Your Kindle” link in the upper left corner.
Under “Your Kindle,” click the “Manage Your Content and Devices” link.
On the “Manage Your Content and Devices” page, under “Your Kindle,” click the “Register Your Kindle” link.
Enter your Kindle’s serial number and your Amazon password.
Click the “ Register My Kindle ” button.
Your Kindle will be registered and you will be able to manage your content and devices.