After Nexus 7 device got its latest firmware version as Jellybean 4.1.2, its time for Samsung Galaxy Nexus users for updating with this all new update. This update comes with a host of stability as well as security features. Though this update doesn’t come with many visual changes, this is the latest and upcoming update. Full credits to the XDA Senior Member kalo86 who has come up with this update, as of now there is no ETA on by when there will be an official Jellybean 4.1.2 update but as in when it arrives we will update you with the same. The ROM also comes pre rooted and enables the use of Flash in the Web browser by default which means that you no longer will have to worry about the flash player download / update. This firmware of jellybean 4.1.2 is based on the JZO54K base.
Note: This firmware is strictly for Samsung Galaxy Nexus I9250 GSM version and not for any other CDMA version of Galaxy Nexus variant. If you continue to apply this on any other variant, then we should not be held responsible for any damage.
Disclaimer: We should not be held responsible for any damage happened to your device due to not following the instructions mentioned. Don’t apply this update in your network locked devices or else it may lock the devices or may even brick the device.
Before applying this update you will have to make sure that you have created a backup of all the data present in your phone so as to make sure that just in case if the data gets lost or corrupted, the same can be restored with the help of below mentioned steps.
SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log - Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”
Note: Don’t backup the data with the help of ROM MANAGER as it may even brick the device for which we should not be held responsible for any damage.
Disable all the antivirus suites in your device and computer. Minimum battery life should not be less than 50% so as to make sure that device doesn’t get turned off in the middle of firmware update process.
Ensure that the device is rooted and installed with the custom recovery image which you can check the same from the Root Checker app. Also, once your phone is rooted, you will have to download the ROM Manager app from the Google PLAY Store.
So assuming that you have followed all the above mentioned instructions, you can now head over to the next step where we will be checking out on how you can apply this update.