Using Odin..Yes
Using Kies or CWM..No

Change rom.?? Or do you mean flash kernel.?

Yes, you are correct. The only thing is when you flashing insecure kernel just for rooting only, it didn't fall under changing rom category. Changing rom is when you flash/update the whole firmware exp from KH1 to KH3.
~~just saying~~ :-)

Each time flash using Odin will increase your binary counter. Buy a usb jig to reset it back to 0 :-)

Got what.? USB jig.?? Use search button. I think his name is derek something like that :-)

Check battery method.?? Wow..this the first time i heard that. As far as i know both version got the same 1650maH battery. o_O
Btw.. 2 easiest way to confirm your version
1) Check at the box. It stated the version I9100 or I9100G at the back of the box.
2) On the phone > settings > about phone > model number.
Also the G version price is lower than the non-G version.

Go to Setting > applications > manage applications > all > camera > clear cache/data
- If have Titanuim use it to clear Dalvik cache
- If still cannot then do factory/hard reset
- If lose apps after factory/hard reset, download back Titanium and use it to restore back all your missing apps

This post has been edited by waveweaver: Oct 22 2011, 07:12 AM

Congratz for those who have succesfull in rooting their phone. If you have Superuser app and CWM then its good. Otherwise download that two apps. Use CWM to make full backup of you rom. Incase shit happen, you can flash back your original rom using CWM. No need to use Odin anymore as flashing using Odin increase your binary counter.
Next download Titanium Backup from market. Use it to backup all you apps. Again if shit happen and you have to do hard/factory reset, you'll going to lose all your apps. Just download Titanium Backup again and then use it to restore back all your missing apps. Easy huhh.. :-P
The G version still dont have custom rom at the.moment but it doesn't stop you from customized your phone. You can't unleash you phone full potential yet as you're using stock rom but you still can customized it to suit your personality.
Download launcher from market. There are a few good free launcher such as LauncherPro, ADW Launcher, Go Launcher EX and even ICS Launcher. Use the one that you like most. Then start customized it by downloading Theme. There are dozen of Theme that you can use together with your Launcher. After that download Icon Pack so you can change and make your icons more beautiful. There are also Fonts Pack where you can add more fonts style in your phone. Try mix and match all of this. You'll learn new things on how to customized and beautify your own phone. There are tons of thing that you can do and learn. Before i stop the ceramah, download Android Assistant app to monitor your battery condition and also to monitor any roque apps that may drain your battery. Another good app is BetterBatteryStats app. You can download this paid app from market or download the apk from xda-forum. Use this good app to monitor if your phone got any wakelocks. Meaning monitor apps that keep running even when your screen is off. Try to minimize or eliminate this wakelocks as it keep your phone from deep sleep thus draining your battery. Ok guys and gals.,
Happy Exploring :-)

This post has been edited by waveweaver: Oct 23 2011, 12:24 AM

You still haven't root your phone? In that case please refer to SGSII official thread and all the steps are there at page 1 - for rooting I9100G.
BTW..for customizing you phone.. no root needed. All those Launcher, Theme, Icons and Fonts also no need to root your phone.You can start by downloading Launcher at market then just follow the step. Try it..you will love it

This post has been edited by waveweaver: Oct 23 2011, 12:52 AM

I expect your SGSII non-G version is still on original stock firmware which is Android 2.3.3.., right.? Once you received firmware upgrade to Android 2.3.4 then this features (display simcard contacts) will appear :-)
This features got nothing to do about G or non-G version but either your firmware is Android 2.3.3 or above.
The G version seems don't have this problem (non display of simcard contacts) because they come right from the box using Android 2.3.4 and some even on Android 2.3.5 already., which have also this features :-))
~~just saying~~

Here's the link on how they managed to install CWM on the G version. Please read all the post to understand better on how to root and install CWM into SGSII - I9100G.
~~cheers~~
http://forum.xda-developers.com/showthread...=1276105&page=8

I'm using SGSII without problem since launch. And so are my cousin. You probably got a defect phone. Bring it to service centre and stop trolling around :-P

Your phone now is an AP set or SME.?

Did you buy your phone in China or M'sia.?
Try do a factory/hard rest and see if the problem solve.
setting > privacy > factory reset

This post has been edited by waveweaver: Oct 29 2011, 06:50 AM

~~@ S2User

Root your phone first and install google market.apk like benny888 said. There still no custom rom for G version at the moment

This post has been edited by waveweaver: Oct 29 2011, 07:11 PM

You only need to chuck in the usb jig and your phone will go into download mode. I'm not sure whether the usb jig can be used with the G version or not. It's better you ask the seller yourself before you buy the jig from him. Here is the usb jig sales thread
http://forum.lowyat.net/index.php?showtopi...&#entry40642755

That's good news for our G version users. Thanks Noobi3

Not Odin mode but goes into downloading mode.
Thanks for the feedback as a few G version user say that the usb jig doesn't work for their phone. Hope your statement and Noobi3 clear ups this confusion :-)

This post has been edited by waveweaver: Oct 31 2011, 03:13 AM

~~@ I9100G
Here's a link for rooting with developers kernel and got CWM together with it. G version user can try but dont blame me if got problems or bricked ~~lol~~
http://forum.xda-developers.com/showthread.php?t=1327509

You can use the older 2.3.5 insecure kernel and use it while waiting for a new 2.3.6 insecure kernel being built.