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[RADIO/GUIDE] Radio JK1, JK8, KB1, KB2, KB3, KD1, KF1, UCKD1, UCKE1 and UCKF1

Radio Flash (Fastboot&ADB)
Radio Flash (Fastboot&ADB)

Radio for Korea Carrier ONLY
Radio KC1
Radio Patch for I9020T ONLY
Radio KD1 =>> KF1
What to know before you start flashing radio?

1. Back up your EFS folder. Click here for the method of backup.
2. Check your phone MODEL (I9020A, I9020T & I9023).
3. Flash the CORRECT RADIO according to your phone model.
4. OPTIONAL After download the radio file, check your downloaded file md5 sum. Click here for the md5 sum
5. After flashing, check your radio baseband at Setting > About Phone > Baseband.

Want to have higher 3G speed connection? Use HSDPA Tweak :p
Lost your 3G Connection? Here's the solution:How to retrieve 3G connection? :p
Got question to ask? Read FAQ first :p
Want to Back up your EFS folder? Click here for the method of backup.
Method of Flashing Radio

Method 1 (ClockWorkMod Recovery):

1, Reboot into recovery,
2, Select "select zip from SD card"
3, Locate where your radio file is
4, Select it and "yes"
5, Wait for it to reboot and you're done! :D

Method 2 (FASTBOOT + ADB):
(FOR WINDOWS Operation System only, NOT FOR MAC OS)

Part 1
1, Download Radio Flash (Fastboot&ADB).zip
2, Extract the folder to Desktop.
3, Open the extracted flash folder.
Part 2
1, Download the file you would like to flash from the link above/attachment below.
2, Extract it to Desktop.
3, Copy the "radio.img" file from the folder and paste it into the Radio Flash Folder you had extracted in PART 1.
Part 3
1, Connect your Nexus S to computer (USB Debugging turn on, SD card mount turn off)
2, Double left click the "START HERE.bat" and command prompt window will open/run.
3, Type: "adb reboot bootloader". (The adb reboot bootloader will take the device directly to fastboot) OR boot the phone to bootloader by pressing the volume up key with power key at the same time.
4, Once your phone has rebooted in to bootloader screen, type "fastboot devices" to ensure your device is detected.
5, After confirm your device is detected with serial number, type "fastboot flash radio radio.img".
6, Once its done, type "fastboot reboot".
7, You're good to go :p

Method 3 (ROM MANAGER):
(Not recommended , but still if method 2 and 3 cant work, use this AT YOUR OWN RISK)

1, Install Rom Manager from Market.
2, Open Rom Manager and select "Install rom from SD".
3, Locate the file where you put the Radio file downloaded.
4, Flash it with Dalvik Cache wipe (Data and Cache wipe NOT required)
5, Enjoy it :D
HSDPA Tweak (Higher/Faster Data Connection Speed)

Method 1 (Via Root Explorer):
[SIZE="3"]1, Open "Root Explorer" and mount R/W.<br />
2, Go to "system" and you will find there is a file name "build.prop".<br />
3, Right click (By holding at the file) and there is menu pop out.<br />
4, Scroll down and select edit in Text Editor.<br />
5, Type in those few line of words below into the last line of the text.<br />
<br /><br /><br /><br /><br />
<br />
6, Save the file and reboot your phone TWICE.[/SIZE]
Method 2 (Via ADB and USB debugging):
[SIZE="3"]Part 1<br />
1, Download the Radio Flash (Fastboot&ADB).zip from above.<br />
2, Extract the folder to Desktop.<br />
3, Open the extracted flash folder.<br />
<br />
Part 2<br />
1, Connect your Nexus S to computer (USB Debugging turn on, SD card mount turn off)<br />
2, Double left click the "START HERE.bat" and command prompt window will open/run.<br />
3, Type: "adb pull /system/build.prop" and DO NOT close the command prompt.<br />
4, In that folder, you will now see a file name "build.prop"<br />
5, Open with notepad/text editor and add in these lined of code. (Copy and paste)<br />
<br /><br /><br /><br /><br />
<br />
6, Then save the file. <br />
7, Type in "adb remount" in the command prompt.<br />
8, Type in "adb push build.prop /system/build.prop" in the command prompt.<br />
9, Reboot your phone TWICE and it should be good to go.[/SIZE]
For those who want to know what those lines means, click here

Click the word "FAQ" above to go to FAQ section.

Disclaimer: I assume you will have the knowledge regarding Rado (Baseband) to flash this radio update, I shall not be liable for anything that happen to your phone, including the procedure and method.
Everything was tested on my phone, not every phone is the same :cool:

Note: Extras credit to steve.garon, soniko, iamxeph , sheek360, BrainMaster and others who provided me the radio and answer :p
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