How to update Galaxy S2 GT I9100 with XWLSU based Android 4.1.2 Jellybean ROM

Galaxy S2 GT (I9100) has received official Jellybean ROM update from Samsung. This latest update is based on Android 4.1.2 ROM with coded name XWLSU or you can say that this OM is based on XWLSU firmware. This update is developed for model number I9100 exclusively so it won’t work on other models like I9100G or any other. I advise you not to try it on any other device as it could lead to some serious damages even (if you try it on other gadgets).

Talking about recent history of updates for Galaxy S2 then it is the phone which has always received high notes from developers. Whether official or custom, S2 is always enriched with quality updates. Same is going to repeat this time too. Galaxy S2 originally comes with Android 2.3.4 Gingerbread OS which is upgradable to Android 4.1.2 JB. It has already received plenty of JB updates but most of them were stuffed with some minor as well as major bugs.

The ROM which I am going to discuss here will address to all previous bugs. It will strengthen battery performance and will solve over heating issues. Along with it, this update will make some minor changes to overall interface which will give this phone a trendy and smooth look.

This update comes from official sources so it will not void your warranty in any case. So if you are beginner to Android world then you can try it out without any second thought about security.

How to install XWLSU based Android 4.1.2 ROM on Galaxy S2
As I earlier said this development kit is developed for S2 model I9100 only so please don’ try it on other machines. Before proceeding to main tutorial process, please read these pre-requisites. These pre-requisites will help you a lot in case of accidental damages.

Now I am dividing the remaining tutorial in two parts.

Part I
This ROM is rolled out in Austria, France, Poland, Romania and Spain. So please download the ROM package according to your country:
• Austria
• Romania
• Poland
• France
• Spain
Download Odin tool to your computer.

How to boot to download mode
You need download booting n next step. Follow this trick:
First turn OFF your S2. Now press and hold Vol Down + Menu keys. While holding both the keys, turn ON your S2. It will boot your S2 in download mode.

PART II
You can flash this ROM by following a set of standard instructions. You can get all those instructions from here.