Google Nexus 5 (Credit: Google Play)
Google Nexus 5 (Credit: Google Play)Google Play

The new CyanogenMod CM12.1 custom ROM series has been released for LG's 2013 flagship Google Nexus 5.

The latest CM12.1 series comes with an important bug-fix for the Stagefright glitch. If the flaw is not fixed immediately, it will leave the smartphones vulnerable to hackers.

Read more: Android Stagefright Bug: How to Minimize its Vulnerability on phone and Everything You Need to Know

Prerequisites (things to remember before installing the Custom ROM):

  • CyanogenMod CM12.1 Android 5.1.1 Lollipop has to be installed on LG-Google Nexus 5 (aka Hammerhead) and CAF models only; if tried on other devices, they might get bricked [To check your device model: Go to Settings >> About phone >> model number]
  • Make sure the device is rooted before going forward with the installation.
  • Installation of custom ROM requires clearing of memory in the smartphone, so make sure to backup the data by installing TWRP.
  • Make sure the PC has USB drivers, or else Google Nexus 5 will not be recognised by the computer.
  • Make sure your device has more than 80 percent battery, or else there is a chance of the smartphone getting temporarily bricked if the installation process is interrupted in the mid-way.
  • Though installing the custom ROM improves the device's performance and UI experiences, it makes the company warranty void and the company will no longer be liable to provide updates. [users can restore warranty by flashing the device with stock-ROM].

[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. IBTimes, India 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.]

Downloadable Links:

Models CyanogenMod CM12.1 Cyanogen Recovery
LG Nexus 5 aka Hammerhead Link Link
LG Nexus 5 CAF aka Hammerheadcaf Link Link

Google Apps: HERE

Tutorial: Step-by-step Installation Procedure of CyanogenMod CM12.1 Android 5.1.1 Lollipop on LG- Google Nexus 5-

Step 1: After downloading CyanogenMod CM12.1 Android 5.1.1 Lollipop custom ROM and Google Apps to the PC, connect LG-Google Nexus 5 to PC via USB cable.

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

Step 2: Place the Android 5.1.1 Lollipop custom ROM zip file and Google apps zip files in to the phone's memory. [Note: Users are advised to paste the files in root folder of the storage, not in any other folder.]

[Note: Before users begin installing the custom software, make sure the device is already rooted and has ClockworkMod Recovery installed].

Step 3: Turn-off the device and disconnect from the PC.

Step 4: Perform the regular 'Bootloader Mode' sortie by press holding 'Volume up', 'Volume down' and 'Power' buttons.

Step 5: Once entering the 'Bootloader mode,' go to the TWRP Recovery mode, then perform full data wipe, by choosing 'wipe data/factory reset'

[Note: Perform the above step if you are migrating from other ROMs. Else, skip this procedure and do dirty flashing, which means wiping only dalvik cache and cache when flashing an updated version of the same ROM you are currently on]

Step 6: Clear the cache memory by selecting 'wipe cache partition'.

Step 7: Go back to the recovery, and select 'advanced' and tap 'wipe dalvik cache'.

[Note: This step is optional, but many recommend this procedure so that users will not face boot loops or any other errors in the middle of the installation]

Step 8: Come back to the main recovery screen and then tap 'install zip from SD card'.

Step 9: Tap 'choose zip from sdcard', go to Android 5.1.1 Lollipop ROM .zip file in the SD card and enter the installation process. Repeat the procedure for installing Google Apps. [Note: use Volume keys to navigate and power button to select options]

Step 10: Once done with the installation process, navigate to '+++++Go Back+++++' and restart the device by opting 'reboot system now' seen in the recovery menu.

Now, your device will take a minimum of five minutes to complete the booting process.

Users should head to Settings >> select 'About phone' to confirm the installation of CyanogenMod CM12.1 Android 5.1.1 Lollipop.

[Credits: CyanogenMod]