[Nexus S General] oldblue910:
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I HAVE CEASED UPDATING THIS THEAD.

The old information contained below will remain for posterity, but will no longer be updated. From this point forward, all updates to this information will be found at http://www.randomphantasmagoria.com/firmware/nexus-s

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Below is a list of all available OTA and full ROM packages for the Nexus S, model I9020T.

THIS IS FOR I9020T ONLY. IF YOU HAVE ANOTHER VARIANT, PLEASE FIND THE THREAD FOR YOUR VARIANT.

Typical disclaimer where I tell you that all of this stuff is at your own risk and I'm not responsible if you mess up your phone, yadda yadda.

These updates are 100% stock and are NOT rooted.

HOW TO FLASH

I'm not giving instructions on how to flash ZIP files or fastboot images. If you don't know how to do that, you probably shouldn't be looking for stuff in this thread. There are plenty of threads on how to flash fastboot images or how to flash zips through recovery. Do a little reading before proceeding.

The recovery-flashable full ROM packages will only flash if your phone has no ROM, any custom ROM, or a stock ROM that's older than the version you're trying to flash. For instance, the 2.3.4 full ROM package will flash over the stock 2.3.1 ROM, but not over the stock 2.3.6 ROM.

With fastboot images, you can flash any version over any other version.

WHAT HAPPENS IF I GET AN ERROR WHILE FLASHING?

If you get an error flashing a recovery-flashable full ROM package, it means that you are running a stock ROM that's newer than the version you're trying to flash. If you're trying to downgrade, then you must install ClockworkMod recovery, then wipe system, boot, data, cache, and Dalvik cache. You will then be able to flash the older version. Optionally, you can also flash fastboot images of a version older than the version you're trying to flash.

If you get an error flashing an incremental update, it means one of four things. Either you don't have an I9020T, you aren't running a stock ROM, you have changed something with your stock ROM (this includes build.prop changes, radio or bootloader changes as well), or you're running Android 4.X and trying to update manually. These incremental updates only work if you are running a completely, perfectly stock ROM exactly the way Google provides it, with the right radio and the right bootloader. There are no exceptions to this rule. Furthermore, Android 4.X ROMs can no longer be updated manually in stock recovery. See below.

A NOTE ABOUT ANDROID 4.X OTAs

Beginning with Ice Cream Sandwich, Google has made a change to stock recovery that prevents you from flashing future OTA updates manually. Instead you are now required to wait for the OTA notification on your phone and then tap "Reboot and Install."

If this pisses you off, you have the option of unlocking your bootloader, installing either a stock Gingerbread recovery or ClockworkMod recovery, and then flashing the OTA updates manually.

LATEST VERSION

The latest Android version available for I9020T is Ice Cream Sandwich version 4.0.4, build IMM76D.

BUILD REFERENCE

GRH55 - Android 2.3

GRH78 - Android 2.3.1

GRH78C - Android 2.3.2

GRI40 - Android 2.3.3

GRI54 - Android 2.3.3 (shipped on some non-USA I9020T devices)

GRJ22 - Android 2.3.4

GRK39F - Android 2.3.6

IML74K - Android 4.0.3

IMM76D - Android 4.0.4

FULL ROMS

FASTBOOT IMAGES

If you're comfortable with fastboot, you can flash these images to return your phone back to raw stock. FLASHING FASTBOOT IMAGES WILL ERASE ALL OF YOUR PHONE'S DATA AND WILL RETURN YOU TO A FACTORY STOCK, UNROOTED STATE.

Android 2.3.1/GRH78/XXJK8 Radio/JK1 Bootloader

Official factory fastboot images, must be flashed using fastboot on an unlocked bootloader. Contains recovery, radio, and bootloader.

THESE IMAGES MUST BE FLASHED USING BOOTLOADER VERSIONS I9020XXJK1 OR I9020XXKA3

Android 2.3.3/GRI40/XXKB1 Radio/KA3 Bootloader

Official factory fastboot images, must be flashed using fastboot on an unlocked bootloader. Contains recovery, radio, and bootloader.

THESE IMAGES MUST BE FLASHED USING BOOTLOADER VERSIONS I9020XXJK1, I9020XXKA3, OR I9020XXKL1

Android 2.3.3/GRI54/XXKB3 Radio/KA3 Bootloader

Official factory fastboot images, must be flashed using fastboot on an unlocked bootloader. Contains recovery, radio, and bootloader.

THESE IMAGES MUST BE FLASHED USING BOOTLOADER VERSIONS I9020XXJK1, I9020XXKA3, OR I9020XXKL1

Android 2.3.4/GRJ22/XXKD1 Radio/KA3 Bootloader

Official factory fastboot images, must be flashed using fastboot on an unlocked bootloader. Contains recovery, radio, and bootloader.

THESE IMAGES MUST BE FLASHED USING BOOTLOADER VERSIONS I9020XXJK1, I9020XXKA3, or I9020XXKL1

Android 4.0.4/IMM76D/XXKI1 Radio/KL1 Bootloader

Official factory fastboot images, must be flashed using fastboot on an unlocked bootloader. Contains recovery, radio, and bootloader.

THESE IMAGES MUST BE FLASHED USING BOOTLOADER VERSIONS I9020XXJK1, I9020XXKA3, OR I9020XXKL1

RECOVERY-FLASHABLE ROMS

Android 2.3/GRH55/XXJK8 Radio/JK1 Bootloader

Unofficial, unsigned, must flash through ClockworkMod Recovery. Contains recovery, radio and bootloader.

Android 2.3.1/GRH78/XXJK8 Radio/JK1 Bootloader

Unofficial, unsigned, must flash through ClockworkMod Recovery. Contains recovery, radio and bootloader.

Android 2.3.2/GRH78C/XXJK8 Radio/JK1 Bootloader

Unofficial, unsigned, must flash through ClockworkMod Recovery. Contains recovery, radio and bootloader.

Android 2.3.3/GRI40/XXKB1 Radio/KA3 Bootloader

Official, signed, can flash with ClockworkMod or stock recovery. Contains recovery, radio and bootloader.

Android 2.3.3/GRI54/XXKB3 Radio/KA3 Bootloader

Unofficial, unsigned, must flash through ClockworkMod Recovery. Contains recovery, radio and bootloader.

Android 2.3.4/GRJ22/XXKD1 Radio/KA3 Bootloader

Official, signed, can flash with ClockworkMod or stock recovery. Contains recovery, radio and bootloader.

Android 2.3.6/GRK39F/XXKF1 Radio/KA3 Bootloader

Official, signed, can flash with ClockworkMod or stock recovery. Contains recovery, radio and bootloader.

Android 4.0.3/IML74K/XXKI1 Radio/KL1 Bootloader

Official, signed, can flash with ClockworkMod or stock recovery. Contains recovery, radio and bootloader.

Android 4.0.4/IMM76D/XXKI1 Radio/KL1 Bootloader

Unofficial, unsigned, must flash through ClockworkMod Recovery. Contains recovery, radio and bootloader.

Courtesy of XDA forum member kibmcz.

INCREMENTAL UPDATES

The links provided here are to Google's official update package for each version. Sometimes Google provides a small incremental update package for upgrading between versions, other times they just provide full ROM packages for bigger version upgrades. For instance, Google pushed a small incremental update to upgrade from 2.3.4 to 2.3.6. If your phone was running 2.3.1, there is no 2.3.1 to 2.3.6 incremental update, so Google would push the 2.3.6 full ROM package.

If you don't see an upgrade path from your version to your desired version, it means you need to use a full ROM package above instead.

Android 2.3 (Build GRH55/XXJK8 Radio/JK1 Bootloader)

2.3 -> 2.3.1

Android 2.3.1 (Build GRH78/XXJK8 Radio/JK1 Bootloader)

2.3.1 -> 2.3.2

2.3.1 -> 2.3.3 (GRI40)

2.3.1 -> 4.0.4

Android 2.3.2 (Build GRH78C/XXJK8 Radio/JK1 Bootloader)

2.3.2 -> 2.3.3 (GRI40)

2.3.2 -> 2.3.4

Android 2.3.3 (Build GRI40/XXKB1 Radio/KA3 Bootloader)

2.3.3 (GRI40) -> 2.3.4

Android 2.3.3 (Build GRI54/XXKB3 Radio/KA3 Bootloader)

Neither of these following OTA updates actually work. Both of them require an unknown radio, and will fail if you try to flash them on a phone running 2.3.3/GRI54 with the XXKB3 baseband. The 2.3.3->2.3.4 update has since been pulled by Google and the link is only provided here for posterity and reference. The only way to properly update 2.3.3/GRI54 is to flash a full ROM over it.

2.3.3 (GRI54) -> 2.3.4 (Update requires an unknown radio and will NOT update build GRI54 with XXKB3 radio.)

2.3.3 (GRI54) -> 4.0.4 (Update requires an unknown radio and will NOT update build GRI54 with XXKB3 radio.)

Android 2.3.4 (Build GRJ22/XXKD1 Radio/KA3 Bootloader)

2.3.4 -> 2.3.6

2.3.4 -> 4.0.4

Android 2.3.6 (Build GRK39F/XXKF1 Radio/KA3 Bootloader)

2.3.6 -> 4.0.3

2.3.6 -> 4.0.4

Android 4.0.3 (Build IML74K/XXKI1 Radio/KL1 Bootloader)

4.0.3 -> 4.0.4