'If you do not update your device by March 22, 2016, you will receive the following message on your device: Your Kindle is unable to connect at this time.
The tablet Isn't rooted simply because I've never had the need to root it for her.
Usually, if you keep the Kindle Fire and Kindle Fire HD/HDX connected to wifi, it will update by itself when a new update is available.
If your Kindle Fire has not updated by itself, there are also other ways to update it: updating Kindle Fire(HD/HDX) on Kindle device and updating by using the computer.
Finding out about an update can be a little tricky: on my Android-enabled phone, I do get notifications of upgrades / updates and it is easy to just tap an icon or two, the update installs, and I move on with life.
With the Fire, however, it can be a little tricky to see if you have any available updates – the original Kindle Fire used to be easy, but with software upgrades to the Fire’s operating system, the release of several new versions of the Fire, I’ve found out the hard way I had available updates that needed to be installed.