You can flash official KJ2 firmware but you will lose your root. After flash KJ2 firmware., you flash back the KJ1 insecure kernel again to gain back your root and CWM.
Use the link below to get root and CWM
http://forum.xda-developers.com/showthread.php?t=1327509

This post has been edited by waveweaver: Nov 6 2011, 05:44 PM

If you're getting a new bootloader then the jig wont work. It only work on the old bootloader. But why should you worry about the yellow triangle? You see it only on the start up :-) .
Another way is to extract and flash the ZImage though i never done it since i sold my SGSII already.

wifi should work properly if you flash official KJ2 full firmware then flash KJ1 insecure kernel :-)

If you have CWM then do a Nandroid backup for your current firmware. Use Titanium Backup to backup all you apps and use SMS Backup and Restore app to backup all you sms. All of this only as a precaution incase shit happen.

If that the case, you shouldn't ask whether the new firmware gonna be wipe or non-wipe :-P

Congratz., got CWM also?

Try power off your phone. Then do a recovery with three buttons combo. See whether you got CWM or not.?
Learn more about CWM from this link
http://forum.xda-developers.com/showthread.php?t=1134290

This post has been edited by waveweaver: Nov 6 2011, 11:03 PM

Good and congratz on your successfull rooting. Now first thing to do is perform Nandroid backup using your CWM. Then download Titanuim Backup from market and do backup for all your apps.
~~enjoy your new phone~~

Yes, rooting is modified kernel in order to gain access into your phone system. Once you gain access, you can tweak your phone such as undervolt, overclock etc..

For those G version user that unfamiliar with rooting, i advice them NOT to root their phone as at the moment there's no custom roms to ply on. Better do your own customize using launcher and theme app from market.
~~my two cents~~

This post has been edited by waveweaver: Nov 8 2011, 07:36 PM

Thanks. And for those unrooted G version user who still don't know how to customize their phone, can refer to my previous post #51 in this same thread :-)

If your phone have old bootloader then just chuck in the usb jig and your phone will go into auto download mode and the yellow triangle will disappear like magic ~LOL~

~~@ casshern94
Here is the link on where to buy and how to use the usb jig
http://forum.lowyat.net/index.php?showtopi...&#entry40642755

Basically the usb jig can be used for three different things
1) Bring/force the phone into download mode.
2) Eliminate the yellow triangle
2) Reset the binary counter

Use postage and sent to you house. Refer to my post #201 for details

What do you mean stock apps.? The pre-installed apps when you buy the phone.??

You had to have a root first in order to uninstall or freeze such apps. Any other apps that download from market can be uninstall easily without need of rooting.

Use Titanium Backup app to freeze or uninstall any apps from your phone. But make sure you know what you're doing. Uninstall some phone system apps can give more problems to your phone. Try to freeze the app instead of uninstall it. Look at xda-dev for the list of apps that are safe for removal.
http://forum.xda-developers.com/showthread.php?t=1069924

This post has been edited by waveweaver: Nov 10 2011, 02:59 PM

Congratz.!! :-)

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Added on November 11, 2011, 12:10 amjust a bit more. shouldn't be a big issue :-P

This post has been edited by waveweaver: Nov 11 2011, 12:10 AM

Dude, there's no CWM apps in the market o_O
Okay, you can try this link first on how to get CWM
http://www.addictivetips.com/mobile/how-to...-android-phone/

And if you still fail to get your CWM then only you use this link below
http://forum.xda-developers.com/showthread.php?t=1327509

Good luck

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Added on November 11, 2011, 8:40 am********
FIRST CUSTOM ROM FOR I9100G PHONES
-------------------------------------+--------------------+
Okay heads up guys. Your very first custom rom is ready to beautify your phones. Don't forget a little donation to the creator of this custom rom.. Apply at your own risk**
~~enjoy~~

http://forum.xda-developers.com/showthread.php?t=1341288

This post has been edited by waveweaver: Nov 11 2011, 08:54 AM