Samsung AT&T Galaxy S2 SGH i777 Android 4.2.1 Jelly Bean has been out.Now this Android 4.2.1 is ported to AT&T Galaxy S II by JellyBam team which is at XDA forums.This is one of the best build of Jelly Bean 4.2.1 for AT&T Galaxy S2.It is based on Cyanogenmod 10.1.
This Android 4.2.1 Jelly Bean custom ROM comes with many additional features, there are many performance tweaks in place, even they have added some visual effects and hence this ROM is good to be used to Galaxy S2 SGH i777 AT&T.
Now I know you guys can’t wait to experience the new Android 4.2.1 Jelly Bean AT&T SGS2 Version!!So lets not wait any further,we have come up with a noob proof detailed tutorial to Update / Install Android 4.2.1 Jelly Bean AT&T Galaxy S2 .
Android 4.2.1 Jelly Bean AT&T Galaxy S2 SGH i777
Before beginning with the procedure to Install Android 4.2.1 Jelly Bean AT&T Galaxy S2 SGH i777 you must know that once the procedure in the tutorial is followed your warranty stands void. The given method is risky and can cause your device to brick. It is therefore recommended that you follow the procedure carefully and perfectly. The processes that you carry out on your device are solely at your risk. We do not take responsibility for any damage to your device.
Lets have a look at the essential Pre Requistes:
1.Firstly you must ensure that you have rooted and installed ClockWork mod (CWM) on AT&T Galaxy S2 SGH i777
2.Minimum 60% of your phone battery must be charged.
3.Back up your phone data.
4.Make sure that you have installed drivers on your computer.
5.Sync your contacts with gmail
6.Enable USB debugging mode(Settings –> Applications –> Development –> USB Debugging)
Following is the Detailed Method to Install Android 4.2.1 Jelly Bean AT&T Galaxy S2 SGH i777:
Now firstly, you need to download the Android 4.2.1 Jelly Bean AT&T Galaxy S2 SGH i777 file.
Here is the download link Android 4.2.1 AT&T Galaxy S2 file . Download from that link
If you see this post too late,Just leave a comment I’ll update it if there is any latest download link available.
After having done with downloading of the above mentioned file , you need to copy the file into you internal SD card.
Now you need to switch of your device AT&T Galaxy S2. Now the first thing to do after this is boot into the CWM Recovery. We will have to use the 3 button combo.
Now to work around in the CWM recovery , you need to make use of the following keys :
To move Up/down use Volume Up /Volume Down Button respectively
To open a selected option, use Home/Power button.
Now there are series of steps you need to perform before you begin your actual process of installation of Android 4.2.1 Jelly Bean AT&T Galaxy S2 SGH-i777
Select and open the ‘Backup and Restore’ menu from the main menu and do the Nandroid Backup(select yes) to restore your files and previous ROM if something goes wrong with the New ROM. Just to be safe.
In order to have practically no errors or bugs whatsoever , you need to wipe the data and factory reset your device.
So go to the ‘Wipe Data /factory reset’ and ‘Wipe Cache partition’ and then perform these processes
Now go to the Advanced menu , you will see a ‘Wipe Dalvik Cache’ menu , select and click on yes to do it.
Now to Install Android 4.2.1 Jelly Bean AT&T Galaxy S2 , go to the ‘Install Zip from Sd Card’ menu , now select and open ‘“choose zip from sdcard’ menu , browse for the Android 4.2.1 Jelly Bean file and then select it and select yes to begin the process to install Android 4.2.1 Jelly Bean AT&T Galaxy S2 version.
Now,repeat the ‘Wipe data/factory reset’, ‘Wipe Dalvik Cache’ and “Wipe Cache partition” to. Now opt for “reboot system now“ option and wait for your phone to get Booted in the Android 4.2.1 Jelly Bean AT&T Galaxy S2 .Normally it will take 2-3 mins for the first boot.