Update HTC Desire Z with Jelly Baby Build 1.5.0 Android 4.2.2 Firmware

HTC Desire Z was found to be a perfect candidate for an update to Android 4.2.2 by a developer who created Jelly Baby Build 1.5.0 custom firmware especially for it.

To show you what features you can get if you use his tool, we created this list; it doesn’t contain all of the features, though: advanced reboot, smoothness improvements, trackpad wake fully supported, new DSP manager and so on.


Getting a taste of all of the above is possible only after finding out what pre-requisites to follow through; here they are: install USB Drivers for this model on your PC, turn on USB debugging on the phone, use the Desire Z that is factory unlocked, charge its battery and create backups via our tutorials (we also suggest backing up the device’s internal memory to an external hard drive or memory card).

Important instructions

  1. The actions to be operated for step one sound imply the download of and Gapps package, available here(you must choose the file labelled gapps-jb-20130301-signed.zip) on your notebook. The smartphone and the laptop should now be helped to plug to each other with the former’s USB cord. Copy the two files to the memory card of the Desire Z, then unplug the devices from one another’s grasp. htc-desire-z
  2. Power the handset off.
  3. Step three will ask you to boot the smartphone into Recovery Mode by pressing and holding together Volume Down and Power; after you boot into HBOOT menu with those two buttons, you have to opt for Recovery, then, if you haven’t already, generate a complete NANDroid backup of the ROM that’s on the phone; like this: choose Backup&Restore, opt for Backup and that’s all.
  4. Return to the Recovery Menu so that you can choose Factory Reset/Wipe Data, then opt for Yes, wait for the wipe action to be over, then go back to the Recovery Menu and choose Wipe Cache Partition.
  5. Opt for Wipe Dalvik Cache for the fifth step, then choose Install zip from SD card.
  6. Select Choose zip from SD card.
  7. The Jelly_Baby_v1.5.0.zip file has to be opted for with Power and this action should be confirmed afterwards. The ROM will only then start its flashing phase on the smartphone.
  8. Do what you did for the file we mentioned, but choose, this time around, the Google Apps archive to install on the HTC Desire Z. Return, after the files are flashed on the device, to its Recovery Menu.
  9. [sc name=”banner-jos”]Opt for the system restarting. And with this last action, your handset is boasting the Android 4.2.2 Jelly Bean.

Are you face to face with a boot loop or is the smartphone blocked on the boot stage? There’s a simple method to have the device back to its original state: initiate a wipe cache partition process followed closely by Wipe Dalvik cache. Do this a couple of times. When done, reboot the Desire Z. Is an error that says “Status 7” present on the display? You should, in this case, flash a compatible ROM, then install the Jelly Baby Build 1.5.0 custom firmware.

Returning to the old ROM will get to happen like this: reboot the smartphone into Recovery, then opt for Backup&Restore. Now choose the ROM you want from a list that needs to appear on the screen of the Desire Z.