Nexus S 4G CDMA – Tutorial to Update Android 4.0.4 Firmware

Sanjana February 7, 2012 0

Google Nexus S 4G CDMA users can now update their smartphone with an all new Android 4.0.4 firmware version. This is not a custom ROM firmware but an official update that got leaked. The OTA update is expected to roll out soon but you do not need to wait anymore as you can manually apply this update with the help of the detail updation procedure discussed here.

samsung nexus s cdma

We wont be responsible for any harm caused to your device during the updation procedure that is unlikely to happen if you follow the instructions carefully. The updation procedure is not recommended for basic users but is for advanced users and is only applicable to Nexus S 4G CDMA smartphones that are network unlocked. Do not apply it in any other GSM device as it might not be reversible and may harm the device by blocking it.


You must backup all the user data present in your phone since chances of data loss or corruption are there. Having a backup will help you replace the lost data if any damage occurs. Follow the link posted below to backup and restore all your data easily.

Pre Upgrade Instructions for Rooting and Firmware Update

Must Have:

Download IMM26 Firmware ZipDownload ICS Kernel  4.0.4

Steps to Update Nexus S 4G CDMA with Android 4.0.4 Firmware:

Step-1: Enable USB Debugging in your phone from the path “Settings > Applications > Development > USB debugging”. Make sure to tick the option of USB Debugging.

enable usb debugging

Download IMM26 Firmware Zip followed by ICS Kernel  4.0.4 from the Must Have section to your computer and connect the smartphone via original USB Cable obtained at purchase time. Copy both the zip files to your phone and make sure not to place them deep into any sub-folders in the phone.

Step-2: Power off your phone to enter into Recovery mode by pressing Volume UP key + OK button and holding both simultaneously press Power button. If the device boots into Normal mode then re-try to enter into Recovery Mode by the same process till you are finally there.

Step-3: In Recovery mode choose the option of “Wipe Data / factory Reset” > “Wipe Cache” and “Clear Dalvik Cache” to clear off all the cache files. In case the device is loaded with any Voodoo tools then disable them as they tend to interrupt during the updation process.

Step-4: Next select “Install zip from sd card” > “Choose zip from sd card” and choose the file named as  “Unofficial-IMM26-deodexed-interactive” placed in your phone. As soon as you select the file, the updation process will begin and the entire process will complete in about 5minutes.

Step-5: After the phone is successfully updated, again select “Install zip from sd card” > “Choose zip from sd card” and and choose the file named as “IMM26.7z”. After the updation process is complete, you will again land up in Recovery mode. Choose “++++ Go Back ++++” > “Reboot system now” option to to get back to the main menu and restart the phone.

In case there is an interruption due to any reason, pull out the battery then re insert it and re follow the entire procedure again from the beginning. Thus you can easily update the latest version of ICS Android 4.0.4 in your Nexus S 4G CDMA smartphone by following the steps mentioned above carefully.

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