Sony Xperia E devices received a small update which will move the firmware from build version 11.3.A.2.23 to version 11.3.A.2.33, according to XDA forum.
Since Sony has not provided an official changelog nor updated its Xperia E support page, therefore, we can not say what improvements and fixes will include the new update. This new update is still Android 4.1.1-software version and probably includes some security fixes from Google and small bug fixes.
The update started to roll out over-the-air and hit the Xperia E devices, so if you did not receive an automatic system message keep an eye on the notification bar, because once your Xperia E device becomes eligible to receive the new 11.3.A.2.33 update you will be prompted by your phone to download and install the update.
The update can be done using a USB cable connected to your computer and update via Sony PC Companion or manually check for an available update by going to Settings->About phone->Software update and follow the instruction appeared on the screen.
It is recommendable to fully charge your battery and also make a backup of your important data before the update.
It seems that in some cases after Xperia E device gets updated, the Internet does not work although Wifi network can be connected.
Courtesy of JiMiTVAiDYA an XDA Developers member you can solve this problem by following some simple steps.
First Go to Settings -> Wi-Fi, then Tap and Hold on the Connected Wi-Fi network, choose Modify network and check Show advanced options. In the IP Settings – Select -> Static and Change DNS 1 – 8.8.8.8 and DNS 2 – 8.8.4.4 then Save.
