How to update old kindle device?

old kindle devices are not 4G enabled as compared to modern kindle devices like paperwhite & Oasis so you can only read books in them as the old kindle wont connect to wifi so without internet connection how we can update its software well the answer is very simple first you have to download the latest version from amazon software update page in your PC or laptop then connect your kindle with your PC via USB cable and transfer the file after transferring install that update so in this way you can easily update your old kindle device.