The firmware update will be available on top of the June 1st update previously provided by Sony to these devices and this patch can be downloaded and installed by the users itself. The firmware update comes with security patches and is being pushed through a new build number i34.3.A.0.194.
Sony released the Nougat update to Xperia X and X Compact on december and now these devices are also getting the security patch update and it's along with the update of other premium smartphones brought in line by Sony. The Android 7.1.1 Nougat update brings a number of features such as app shortcuts, keyboard image insertion, new emojis, support for circular app icons, better battery backup, smooth performance and more.
