How to Root and install JB on your AT&T S3

I am not responsible for any damage done to your S3. But if you follow the instruction then you have nothing to worry about. There may be other guides out there but this is what I used and it works perfectly.

First, you do need Windows. I used Windows 7 via virtual machine and at least 75% charge on the phones battery. (to be safe)

Download these three files to your phone. NOT the SD card.

Rooting package
CyanogenMod Rom nightly build
Google Apps Package

~ Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.

~ You need USB device drivers for the AT&T Galaxy S3 installed on your computer. You can use Samsung Kies to obtain the drivers or via Samsung’s support page.

~ Enable USB Debugging on your phone. You can do this by head to Settings > Developer’s options > USB Debugging. Make sure that there is a check mark beside that option.

~ Temporarily disable Samsung Kies, antivirus, and firewall software as they may disrupt Odin during the installation process.

~ Download the following files and save it to your Windows OS:

Odin3 v3.04 (Odin3-v3.04.zip, 457 Kb)
ClockworkMod Recovery (clockworkmod.TAR, 6.8 MB)

~ Extract the Odin3-v.304.zip file using any extracting software such as 7-Zip or WinZip. Place the contents inside a single folder.
Launch the Odin3 v3.04 application by double-clicking Odin3 V3.04.exe.
Switch off your phone.

~ Boot into Download Mode. You can do this by pressing and holding down the Volume Down key, Home, and Power buttons until you reach a “Warning!!!” message displayed on your screen. Press the Volume Up button to enter Download Mode.

~ Connect your phone to your computer via USB cable. Your computer will automatically install the necessary drivers. If the installation was successful, you will see an “Added!!” message in Odin’s message box on the bottom left.
~ In Odin, select the PDA button, then browse for the clockworkmod.TAR file.
~ Important! Uncheck “Auto Reboot” leave “F. Rest Time” checked. Do not touch any other option except the ones mentioned in this guide. Doing so might brick your device. You need to Disable auto reboot because of the new OTA updates. If you leave auto reboot on when the phone reboots it will overwrite clockwork.

~ Once the necessary file is in place, click the START button in Odin to begin flashing the ClockworkMod Recovery on your phone.

(In case you get a FAIL message, disconnect your phone, close the Odin application, remove then reinsert your phone’s battery, and start over from step 5.)

~ Once the process is complete unplug the USB cable and pull the battery on the phone. Reinstall battery and boot into upload mode by holding the power + home + volume up button. Use the Volume buttons to navigate and the Home button to confirm an option.
~ Select Install ZIP From SD Card.
~Select Choose ZIP From SD Card, then browse for the ~CWM_SuperUser_3.0.7.zip file and select it. Confirm the installation by selecting Yes on the screen that follows.
~After the installation is complete, head back to the main recovery menu.
Select Reboot System Now to reboot your phone.

Once your phone boots up, you need to install the BusyBox binaries. Download the BusyBox app free from the Google Play Store and install it on your phone.
Run the BusyBox application on your phone.
When asked for root access, tap the Allow button.
Select the red “X” to close the dialog window that will pop out.
BusyBox will then scan your phone.
Select Install to begin installing BusyBox and make the necessary file changes on your phone. After the installation is finish, exit the BusyBox application.

~ This is very important! You need to download and install Rom Manager from the Play Store. Flash the newest version of ClockwordMod Recovery from this application. Then select reboot into recovery or shut down and do it manually as shown above.

~ Create a NANDroid backup to backup your current ROM. In case there is something that doesn’t work out with this ROM, you can always revert to your old ROM. To perform a backup, select Backup and Restore and on the next screen, select Backup again. Head back to the main recovery menu once backup is complete.
~ Select Wipe data/factory reset. Select Yes on the next screen to confirm data wipe.
~ Select Install ZIP from SD card, then select Choose ZIP from SD card.
~ Browse for the downloaded CM10 ROM file and select it. Confirm the installation by selecting Yes on the next screen. It may take a couple of minutes for the ROM to finish installing.
~ Repeat step 6, but this time around select the gapps-jb-20120726-signed.zip to install the necessary Google Application package.
~ Head back to the main menu by selecting Go back and reboot your phone by selecting Reboot system now.

You are all done. Enjoy Jelly Bean.

Another quick note. CyanogenMod also makes roms for Tmobile, Sprint, and Verizon. Download YOUR EXACT ROM from the link below. Everything else in the guide is the same just use the RIGHT ROM!!!!

CyanogenMod

LIVEFRMNYC said:

Nice step by step instructions.

I've installed several ROMs on my GS3(AT&T) but did it slightly different. I don't have Busybox installed. Is it really needed? I haven't seemed to run into any trouble without it.

Anyways I restored back to stock for now as I was only play around and testing ROMs. I haven't tried a CyanogenMod ROM yet. I'll probably give it a try tonight.

Click to expand...

Good question. I do not know for sure I just follow instructions... You may not need it.

"BusyBox is a software application that provides many standard Unix tools, much like the larger (but more capable) GNU Core Utilities. BusyBox is designed to be a small executable for use with the Linux kernel, which makes it ideal for use with embedded devices. It has been self-dubbed "The Swiss Army Knife of Embedded Linux"."

Honestly, I think it is a tool for those who are much more familiar with Linux and a certain amount of programming.

http://www.youtube.com/watch?v=CWLcD6Z0ltw

iphonefan74 said:

Are you able to fast boot back to get the official update when its released?

No, you dont NEED Busybox for most custom ROMs

Click to expand...

Yes, you can restore stock rom via clockworkmod. That is, if you backed it up. I am not a rooting expert.

3bs said:

Jailbreaking has become a matter of one click. Rooting/flashing/tweaking Android phones is much more complicated in my opinion but I enjoy it (I'm no expert either though).

Click to expand...

I remember the first jailbreaks on the original iPhone were much more complicated. Tethering on the edge network... Even video recording on the 3G before it could officially do it. Good times... lol

3bs said:

You'll get all the info you need from xda. Just Google xda galaxy s3 att forums. I'm not on my phone right now or else I'd post a link.

I'm not opposed to this being a sticky but I just don't see it happening. Why would they make a sticky for this specific phone.

Click to expand...

Since this is an Apple website, we are probably lucky to get even the iPhone alternative sub-forum let alone a rooting and rom section. XDA is great but it their knowledge level is way above the average person and their willingness to help newcomers is lacking.

Installing Google Now on ICS

Here is another quick guide. It is really easy to install Google Now on your ICS S3. Just follow the instruction to root your phone. Download the Google Now file here
and install it via ClockworkMod Recovery. Then you will have Google Now on your stock ICS.

navajarunner said:

So is it safe to say that if I just wanted to root and keep the 'stock ICS' I would stop after installing CWM_SuperUser_3.0.7.zip?

Click to expand...

Correct. But you still need to update ClockworkMod Recovery to flash anything. Such as Google Now.

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dojoman said:

This will void warranty right? There's a counter in the system if you flash the ROM.

Click to expand...

No, you can download a program off of Play Store called Triange Away that will reset your flash counter.