We were not the first to receive the latest Jelly Bean update for Samsung Galaxy S3, but at last it has arrived in our country. Today, first thing in the morning (around eight o'clock) the free models of this reference terminal have received the corresponding notification to proceed with the update.
Therefore, the owners of this phone put themselves on the same level as those in Sweden or the United Kingdom when it comes to the operating system of their devices. To proceed with the update, all you have to do is confirm the notice that appears in the Notification Bar and wait for the process to complete (which includes a restart of the terminal after the usual screen with an installation progress bar). Also, as is customary with Samsung, after finishing a new confirmation of the conditions of the Automatic Updates.
How to update: OTA and Samsung Kies

In addition to the OTA notice, you can go to Settings > About phone > System updates > Check. If you prefer a computer, install Samsung Kies, connect the mobile via USB and press Check for updates. It is normal that the deployment be staggered by country and operator.
- Recommended: sufficient battery and WiFi.
- Size approximate OTA: 284,20 MB (some operator variants are around 318 MB).
- If the notice doesn't appear, wait a few hours or check with Choose.
The installed version of Android is 4.1.1
Once I know install the update, and if you access the menu Adjustment and then to the submenu About this device, it can be verified that the information offered by the Samsung Galaxy S3 terminal is the following:
- Android version: 4.1.1
- Baseband version: I9300XXDLID
- Kernel Version: 3.0.31 - 256827
- Build number: JRO03C.I9300XXDLIH
The improvements that are achieved in Samsung Galaxy S3 by carrying out the process is a more stable and faster operation, something we noticed both when running applications and when navigating through menus. Improvements have been added to Notification bar, access to Google Now, and the usual minor bug fixes. This update, which can also be done with the software Samsung Kies, arrives for the free terminals; the same will soon happen for those customized by the different operators.
Advanced alternative with Odin (official and at your own risk)

If you don't want to wait, it is possible to install the official firmware Odin. Requirements: have drivers (installing Kies), activate USB debugging, walk into Download mode (Volume down + Home + Power), open Odin, press PDA and choose the file .md5, and then Start. The package is multi language (includes Spanish). Although updating with Odin does not usually erase data, it is recommended factory reset after the process; if it remains in a boot loop, it enters recovery and do Wipe/Factory reset.
Operators, FOTA and upcoming improvements
Deployment begins in free terminals and may be brought forward by certain operators (for example, some have confirmed availability earlier). Telstra and others, arrival may take a few days. Via FOTA, make sure you have a Samsung account activate (Settings > About phone > Software update) and follow the wizard; for Choose, connect the phone and press Update firmware. Later it also spread Android 4.1.2 with functions like Multi-window, smart rotation, and apps like GroupCast y Paper Artist, which improve productivity and multimedia use.
If you choose OTA or Kies you will get the stable version, with the build JRO03C.I9300XXDLIH on compatible devices. Connect to Wi-Fi, fully charge the battery, and let the process complete without interruption to enjoy the optimized Jelly Bean experience on the Galaxy S3.