i've recently bought a Nexus S which is a non-US/UK (GT-i9020) version having a SC-LCD screen (GT-i9023).
Which is not, sadly, the only difference...
MOD EDIT: This tutorial also applies to AT&T/Rogers/Telus variants of the Nexus S with SAMOLED screen (i9020A)
This tutorial is based on AllGamer's [GUIDE] Step by Step ROOT Nexus S via ClockworkMod Recovery image (i9020 only).
Part 1 - Drivers
1 - Download Android SDK
2 - Unzip & launch "SDK Manager.exe"
3 - Cancel the first popup & go to "Available packages" > "Third party Add-ons" > "Google Inc."
4 - Select "Google USB Driver package" & click "Install Selected"
5 - Once you're finished go to your SDK installation "extras\google\usb_driver" dir
6 - (MOD EDIT: Ignore this step for i9020A models) Open "android_winusb.inf" and add the following lines to both "[Google.NTx86]" and "[Google.NTamd64]" sections :;as described here [SOLVED] Google Android USB drivers - Nexus S SCLCD GT-i9023 not recognized
;Google Nexus S GT-i9023
%SingleAdbInterface% = USB_Install, USB\VID_18D1&PID_4E20
7 - Turn Off your SNS
8 - Make sure the SNS is connected to the PC via the USB cable
9 - Boot the SNS into the Bootloader Interface, by holding Volume UP & Power button
It reads LOCK STATE - LOCKED
Open Device Manager (or run devmgmt.msc) make sure you don't see this problem (windows failed to identify the SNS and install the correct drivers)
10 - Do a right click and select Update Driver Software
11 - Select Brose my computer for driver software
12 - Point it to your Android SDK installation "extras\google\usb_driver" dir
13 - Make sure to CLICK "Let me pick from a list of device drivers on my computer"
14 - Then from the list 3 choices select Android Bootloader Interface
15 - If it's installed properly it should show up like this (reboot is not required)
NOTE: if you encounter problems like question marks, unknown drivers, or exclamation marks eve after you have installed the drivers, download and try the USBDeview 32/64 to remove and uninstall all the junk USB devices from your computer/registry
Part 2 - Unlock
1 - Open a command prompt go to run & type "CMD" & hit enter
2 - Switch to the directory where you unzipped the Android SDK & go to "tools"
3 - Type "fastboot oem unlock" & hit enter
Then you will get thisfastboot oem unlockSelecting YES will wipe EVERYTHING from the SNS, so make sure you have backed up everything you needed to safe before you continue.
4 - Use the Volume up/down keys to select and Power key to apply
you should see something like this after it's done... OKAY [435.433s]Now back on this screen you should read
finished. total time: 435.433sLOCK STATE - UNLOCKED
Part 3 - Recovery
1 - Download the ClockworkMod recovery image (for i9020A models, use this i9023 recovery image too!) 3024v3-i9023.img from [MOD][RECOVERY]Clockwork 18.104.22.168 New wipe & confirm menus!! i9023 & i9020 versions
2 - Save it to the Android SDK "tools" dir
3 - Open a command prompt go to run & type "CMD" & hit enter
4 - Switch to the directory where you unzipped the Android SDK & go to "tools"
5 - Then type "fastboot flash recovery 3024v3-i9023.img" & hit enter
You should get something like this, if not your image is corrupted, download it againsending 'recovery' (3980 KB)... OKAY [ 0.621s]6 - Then back on the SNS select Power Off (Reboot also works)
writing 'recovery'... OKAY [ 0.511s]
finished. total time: 1.132s
Part 4 - RootYou're now free to install the ROM you want.
1 - Power ON the SNS
2 - Download su-22.214.171.124-ef-signed.zip from [APP] Superuser 126.96.36.199 - Now on the Market [2010-09-05]
3 - Save it to the Android SDK "platform-tools" dir
4 - Open a command prompt go to run & type "CMD" & hit enter
5 - Switch to the directory where you unzipped the Android SDK & go to "platform-tools"
6 - Type "adb push su-188.8.131.52-ef-signed.zip /sdcard/su-184.108.40.206-ef-signed.zip" & hit enter
7 - Boot the SNS into the Bootloader Interface, by holding Volume UP & Power button
8 - Select "Recovery
9 - Then it should boot into this screen, if not then repeat the steps to download the image
10 - Select "Install ZIP from sdcard" (power button to apply)
11 - Select "Choose ZIP from sdcard" (power button to apply)
12 - Select su-220.127.116.11-ef-signed.zip (power button to apply)
13 - Select "Yes - su-18.104.22.168-ef-signed.zip"
Should saysInstall from sdcard complete15 - select go back
16 - select reboot
Have fun, take care !
Credits goes to AllGamer & afilopou