Connect your device to your computer via USB. On tablets, you may need to select "Transfer Files" from the USB notification. Drag and drop the downloaded file into the Internal Storage root folder (not in any subfolders).
Go to Settings > Device Options > System Updates and tap Check Now . download fireos
If your device is having trouble connecting or you want to update multiple devices without using bandwidth on each one, you can download the update file directly from Amazon's official repository. Connect your device to your computer via USB
Most Amazon devices are designed to download and install FireOS updates automatically in the background when connected to Wi-Fi. download fireos