[Q] Root a possible rooted phone? - Galaxy S II Q&A, Help & Troubleshooting

Hi all!
I am exceptionally new here, especially with Android. I've been a long time Blackberry user and the difference between both OS are really different. Felt like a grandma using this phone.
But anyway, I've done a lot of research and reading on this forum about upgrading firmware, rooting and etc. but still have questions that need to be clarified.
I have purchased a GS2 from a store that gets their phones from overseas. Thus my phone is not from a carrier and is from a different country.
I tried upgrading my firmware using Kies but it's not allowing me:
"This version of the device cannot be updated"
I know for sure there's new firmwares to be updated as I have owned another GS2 before this one and it was fine at updating through Kies. I had to return it for a burnt image (that can be for another thread).
Here's my phone's info:
PDA: I9100ZSKF1
PHONE: I9100XXKE4
CSC: I9100OZSKE7
kernel: 2.6.35.7-i9100ZSKF1-CL225635 [email protected] #6
Not sure if this is related or not but when I first turned on the phone, everything was in Spanish and had no choice in the Language option to change to Chinese (just in case but I use English normally). So I asked the boss of the store how can I get Chinese on this thing? So he just took the phone and did his magic. I was waiting for about half an hour, he gave it back to me and everything was in Chinese. Changed it back to English, went home and played around with it. Realized I have a Super User app in my app drawer. I was suspecting that the boss rooted my phone just to get the Chinese language on. Because for sure it would not come stock.
So my big question is, if this phone is/was indeed rooted, how do I check? If I root not knowing that this is rooted already, would there be any problems that may arise?
Kernel wise, since this phone was originally in Spanish, it wouldn't make sense to have a China/Hong Kong kernel. Does it? I'm so new at this that I don't know if kernel's country make any difference. Oh yeah, I don't even have a freaking warranty card for this phone, I guess I wouldn't even have Samsung's warranty.
Thanks in advance. And sorry for the long post...

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shirbo.g said:
So my big question is, if this phone is/was indeed rooted, how do I check?
Click to expand...
Click to collapse
Do you have a superuser icon in your app drawer? If yes then you're rooted.
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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If I root not knowing that this is rooted already, would there be any problems that may arise?
Click to expand...
Click to collapse
You root by flashing a cf-root kernel, flashing it again wont cause any issues at all.
I wouldn't worry about origin of kernel's.

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App from market called root checker.
Helps diagnose any problems too.
Sent from my GT-I9100 using XDA App

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shirbo.g said:
Hi all!
I have purchased a GS2 from a store that gets their phones from overseas. Thus my phone is not from a carrier and is from a different country.
I tried upgrading my firmware using Kies but it's not allowing me:
Either phone provider has no update or the model code has no update .
Updates are vendor and country specific release not worldwide .
Not sure if this is related or not but when I first turned on the phone, everything was in Spanish and had no choice in the Language option to change to Chinese (just in case but I use English normally). So I asked the boss of the store how can I get Chinese on this thing? So he just took the phone and did his magic. I was waiting for about half an hour, he gave it back to me and everything was in Chinese. Changed it back to English, went home and played around with it. Realized I have a Super User app in my app drawer. I was suspecting that the boss rooted my phone just to get the Chinese language on. Because for sure it would not come stock.
Root does not install language .
So my big question is, if this phone is/was indeed rooted, how do I check? If I root not knowing that this is rooted already, would there be any problems that may arise?
Not normally you require KF1 root
. Oh yeah, I don't even have a freaking warranty card for this phone, I guess I wouldn't even have Samsung's warranty.
Root = no warranty .
Looks to me like you have had China/Hong Kong firmware flashed = ZS code in the store . Kies update route probably now blocked as phone codes dont match .
Guide
http://forum.xda-developers.com/showthread.php?t=1125282
Stock Roms .and csc
http://forum.xda-developers.com/showthread.php?t=1075278
Root + CWM .
http://forum.xda-developers.com/showthread.php?t=1103399
jje
Click to expand...
Click to collapse

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Thanks for the prompt reply guys. I downloaded Titanium backup to check (as out needed root access in order to work) and it said I did! Lol the boss saved me from rooting myself.
Thanks again for all the helpful resources.
Sent from my GT-I9100 using XDA App