Sony Xperia Z
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Prolific software programmers of XDA Developers Forum have released the latest CyanogenMod CM12.1 series custom ROM to the Sony's 2013 flagship smartphone Xperia Z1 (aka Yuga) model.

This new CM12.1 custom ROM is based on the AOSP (Android Open Source Project) 5.1 Lollipop OS. But, we like remind that this is an experimental alpha version with some untested bugs in it. We advise our readers to go through the whole tutorial article before going forward with the installation.

Prerequisites (Things to remember before installing the CyanogenMod CM12 Nightly):

  • This new CyanogenMod CM12.1 Android 5.1 Lollipop firmware has to be installed on the Sony Xperia Z (aka Yuga) model; if tried on other devices, it might get bricked [To check your device model: Go to Settings >> About phone >> model number]
  • This custom ROM is not Pre-rooted, so users are advised to the root the device via SuperSU before going forward for custom ROM installation
  • Installation of custom ROM requires clearing of memory in the smartphone, so make sure to back all the data by installing Clockwork Mod (CWM) Recovery/ TWRP in the smartphone.
  • Users make sure you have installed USB drivers on the PC, or else your smartphone (Xperia Z) will not be recognized by the computer.
  • Make sure your device has more than 80 percent battery, or else there is a chance of smartphone getting temporarily bricked if the installation process is interrupted mid-way.

[Disclaimer: This procedure is very technical and should be performed by a person with sound knowledge of rooting (or manual software installation) Android devices. If the step-by-step installation process is not followed properly, there are chances of the smartphone getting bricked or being permanently irreparable. International Business Times, India Edition cannot be held responsible for any damage or claims from readers if the procedure does not yield the required results or if the smartphone is bricked. Hence, users are advised to proceed with caution.]

Step-by-step installation Guide of CyanogenMod [Unofficial] Android 5.1 Lollipop CM12.1 Custom ROM Nightly on Sony Xperia Z:

Step 1: Download CyanogenMod [unofficial] Android v5.1 Lollipop CM12.1 custom firmware (HERE) and Google Apps (HERE) in to your PC.

Step 2: Connect Sony Xperia Z to PC via USB chord.

[Note: Before plugging the phone to the computer, be sure that you have installed USB driver software, if not, click (HERE) to download firmware]

Step 3: Then, place Android 5.0 Lollipop custom firmware .zip file and Google Apps .zip file into the phone's SD card memory. [Note: Users are advised to paste the .zip file in SD card root, not in any other folder.]

[Note: Before users' begin installing the custom software, be sure that the device must have rooted and has installed ClockworkMod Recovery tool.]

Step 4: Now, turn off the device and disconnect from the PC.

Step 5: Then perform the regular 'Recovery Mode' sortie by press holding 'Volume (Up)', 'Home' and 'Power' buttons.

Step 6: After entering the RECOVERY mode, clear the phone memory, by choosing 'wipe data/factory reset'

[Note: use Volume keys to navigate and power button to select options, while operating under Recovery Mode]

Step 7: Now, clear the cache memory by selecting 'wipe cache partition'

Step 8: Then to go back to ClockworkMod recovery, and select 'advanced' and tap 'wipe dalvik cache' [Note: This step is optional, but many recommend this procedure so that user will not face boot loops or any other errors in the middle of custom ROM installation]

Step 9: Again come back to main recovery screen and then tap 'install zip from SD card'

Step 10: Then tap 'choose zip from sdcard' and go to Android 5.0 Lollipop ROM .zip file in SD card and enter the installation process. [Note: use Volume keys to navigate and power button to select options]

Step 11: Once done with the installation process, navigate to '+++++Go Back+++++' and re-start the device by opting 'reboot system now' seen in the recovery menu.

Now, your device (Sony Xperia Z) will take at least five minutes (only for the first time) to complete the booting process.

Users then head to device's 'Settings' option>> select 'About phone' to confirm the installation of Android v5.1 CyanogenMod CM12.1 custom firmware.

[Credits: XDA Developers Forum member- Olivier ]

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