How to Manually Install New Software Updates on Kindle
Kindle Firmware Update 5.9.6 Lets You Install Your Own Fonts - The Digital Reader
How to see your serial number, firmware version, and storage on Kindle
How to Update Kindle Paperwhite Firmware
2 kindle paperwhites same model in the same UK house updated to latest firmware now have different User Interfaces. One kindle won't activate new UI even after system reset and logging back
How to Manually Install New Software Updates on Kindle