Own an Amazon Kindle from 2012 or an older model, here's something urgent that needs your attention: you are required to install a software update by March 22, failing which you won't be able to continue using Kindle services on your device. Here's the list of devices require the latest software version: If your device is in the list and you miss the update deadline, you will receive the following message on your device: "Your Kindle is unable to connect at this time. Please make sure you are within wireless range and try again. If the problem persists, please restart your Kindle...
Source: http://www.gsmarena.com/urgent_mandatory_update_for_select_kindles_that_needs_to_be_installed_before_march_22-news-17330.php