If you own a Kindle e-reader, you might be wondering how to update the software. Updating your Kindle's software is a quick and easy process that can be done wirelessly. Here's how:
First, make sure your Kindle is connected to a Wi-Fi network. Then, open the Menu and select Settings. Next, select Device Options, then tap Software Updates. Finally, tap Update.
Your Kindle will now check for updates and install any that are available. Once the update is complete, your Kindle will restart automatically.
Source: kindle software update