Amazon: Kindle older with no online access after 03.22, you must update

Amazon announced the availability of a critical update addressed to the holders of one of the older Kindle models. The update is necessary to continue to access online content and must be completed by March 22 next year. No update, the affected models will not be able to download e-books from the Kindle Cloud, access to the Kindle Store and Kindle use other services that require access to the network.

No update, after a specified time, the device will display the following message: Your Kindle can not currently connect. Make sure your device is connected to a wireless network and try again. If the problem persists, restart your Kindle from the Settings menu and try again. To restore access to online content you need to upgrade. The models affected include:

Kindle (2nd Generation) (2009)> version sw request 2.5.8
Kindle DX (2nd generation) (2009)> version sw request 2.5.8
Kindle Keyboard (3rd generation) (2010)> sw required version 3.4.2 or later
Kindle (4th Generation)> sw required version 4.1.3 or later
Kindle (5th generation)> sw required version 4.1.3 or later
Kindle Touch (4th generation)> sw required version 5.3.7.3 or later
Kindle Paperwithe (5th generation) (2012)> version sw request 5.6.1.1 or later
The Kindle automatically perform the software update, when connected to the WiFi network in standby mode, but if it is customary to use the device disconnected from the network, you should verify that you have completed the upgrade by July.

To make the software update via WiFi, simply:

From the Kindle Home screen, select Menu or the Menu icon and then synchronize and search elements
Keep the Kindle connected to a charging source for the battery and connected to WiFi during the update operation (Amazon suggests let it charge overnight)
Process not dissimilar to the models equipped with wireless connectivity (3G) - Kindle (2nd Generation) and Kindle DX (2nd generation): Menu> Turn wireless connection via the navigation button> Menu> Sync and search elements, always connected to a source of charging for the battery and with active wireless connectivity.