If you have recently updated your Galaxy S2 to Jelly Bean OS you have probably noticed that even though we are talking about an official software, there are still bugs and issues on the system. Well, in order to help you out, today I will show you how to install a bug-free firmware on your Samsung Galaxy S2 I9100. The [ZERO]BUG custom ROM is based on the Wanamlite platform and it will flash a similar OS with the stock Android 4.1.1 Jelly Bean ROM, so you will be enjoying a smooth and fast firmware that keeps the default (though without bugs) Android experience on your Galaxy S2.
This OS has been developed by those of xda-developers so we have them to thanks for the present tutorial. Now, even though the [ZERO]BUG is similar with the stock Jelly Bean software, it must be clear for you that you won’t install an official update on your Samsung Galaxy S2. Furthermore, the platform is also coming with extra features and capabilities most of them ported from the Wanamlite custom ROM. Beside that, the upgrade is focusing in removing the bugs and issues that was reported by those who had tried the stock Android 4.1.1 OS on the Galaxy S2.
On the [ZERO]BUG ROM you won’t find lockscreen freezes, message scrolling lags, and battery drain; also the Adobe Flash Player is working perfectly and the Dolphin browser also supports flash. The firmware is deodexed and installed with many other features and tools, so if you want to make a proper idea about the same check our source page from here. Then, return to this step by step guide and resume the rest of the lines for learning how to easily install the [ZERO]BUG software on your Samsung Galaxy S2.
Unfortunately, flashing this ROM will require your attention as you will have to first prepare the phone for the installation procedure. Don’t worry though as the pre requisites can easily be completed and your handset will be in safe hands. You should know that once you start this tutorial the warranty of your Galaxy S2 will be void and the only way in which you can restore the same is by downgrading to the stock Jelly Bean ROM, or by updating with a future official firmware released by Samsung and suitable with your S2.
Now you should begin with a root operation. You see, if you don’t unchain the system of your SGS2, you won’t be able to apply the [ZERO]BUG Jelly Bean 4.1.1 custom ROM. Then, you should get and install a custom recovery image, which is a complex tool that can be used for maintenance, optimization, update, backup and restoration procedures and as you will see it will be extremely important for us. Take note that the recovery image can be flashed only on a rooted device.
Next, it is more than recommended to complete a backup operation. You will have to wipe the Galaxy S2 system, or else the Android 4.1.1 based [ZERO]BUG ROM will not work on your phone. So, all of your personal saves will be wiped out. In order to avoid the unpleasant situations you must first save the contacts, messages, call logs, EFS, market apps and everything else you might need. Also, if possible, it will be a good idea to apply a Nandroid backup.
In the end, a computer or notebook should be near you as you will have to use one. Also, the S2 and its USB cord will be required. On the other hand, the phone must have enough battery life (minimum 60% power left) in order to stay “alive” during the update process so use the charger before going any further. Also, on the computer / notebook and on the device it is recommended to deactivate the Firewall and antivirus protection because these programs might interfere with our work. Remember that this step by step guide has been developed only for installing the [ZERO]BUG Jelly Bean 4.1.1 OS on the Samsung Galaxy S2 model number I9100, so don’t use the same for updating a similar device with this firmware as you will risk in bricking your beloved phone / tablet.
How to Update Galaxy S2 with [ZERO]BUG Jelly Bean 4.1.1 Custom ROM Firmware
Download the update by using one of the below links and save the file on your computer.
Connect the handset with the computer / notebook via USB cable.
Select the downloaded file and drag and drop it to your phone’s SD card.
Remove the USB cable as we won’t use the computer from now on.
Turn off the SGS2.
Reboot by pressing the Volume Up, Power, and Home buttons. In this way the recovery mode will be displayed.
By using the same first select to apply a full wipe (remember to backup the data first).
For the wipe select “wipe data factory reset”, “wipe cache partition” and “wipe dalvik cache”.
Select “+++go back+++”.
And then choose “install zip from SD card” followed by “choose zip from SD card”.
You can pick and install the update file now.
When the flashing operation is over, select “+++go back+++” and “reboot system now” and you are done.
If you notice that the first boot is taking longer than you was used to, don’t worry as there is nothing wrong with your device. A custom ROM was installed, so the first boot will take a while.
That was pretty all for now; your Samsung Galaxy S2 has been updated with the Wanamlite powered [ZERO]BUG Android Jelly Bean 4.1.1 custom ROM firmware. The software is similar with the stock one so there should be the classic and usual Jelly Bean theme and interface installed. Do test the OS and tell us if you notice the improvements. Also, stay close as we will bring new tutorials suitable with your Galaxy S2 soon.