Cyanogen releases Android 5.1 Lollipop based Cyanogenmod 12.1 Nightly ROMs for numerous  smartphones
Cyanogen releases Android 5.1 Lollipop based Cyanogenmod 12.1 Nightly ROMs for numerous smartphonesIBTimes India

Custom ROM developer community CyanogenMod has released a new firmware to Google Nexus 4.

The new software is based on the Android 5.1.1 Lollipop and comes with a critical security patch for the Stagefright bug. If the bug is left unchecked, it leaves smartphones vulnerable to attacks from hackers who can take control of the device with just an MMS.

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

Prerequisites (things to remember before installing Custom ROM):

  • CyanogenMod CM12.1 Android 5.1.1 Lollipop custom ROM has to be installed on the LG-Google Nexus 4 (aka Mako) only; if tried on other devices, it might get bricked [To check your device model: Go to Settings >> About phone >> model number]
  • Make sure the device is rooted 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.
  • Make sure you have installed USB drivers in the PC, or else your phone (Google Nexus 4) will not be recognised by the computer.
  • Make sure your device has more than 80% battery, or else there is a chance of the smartphone getting temporarily bricked if the installation process is interrupted midway.
  • Though installing custom ROM improves the device's performance and UI experiences, it makes the company warranty void; the company will no longer be liable to provide updates in future [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. 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.]

CyanogenMod CM12.1 Downloadable files:

Google Nexus 4 CM12.1: HERE[Build date: 29/08/2015]

Cyanogen Recovery:HERE

Google Apps: HERE

Tutorial: Step-by-step Installation Procedure of CyanogenMod CM12.1 Android 5.1.1 Lollipop custom ROM on LG-Google Nexus 4-

Step 1: After downloading CyanogenMod CM12.1 Android 5.1.1 Lollipop custom ROM and Google Apps in to the PC, connect LG-Google Nexus 4 (aka Mako) to PC via USB chord.

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

Step 2: Place Android v5.1 Lollipop ROM zip file and Google Apps .zip file into the phone's memory.

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

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 ClockworkMod Recovery mode, then clear 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 6: Clear the cache memory by selecting 'wipe cache partition.'

Step 7: Go back to the ClockworkMod 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 custom ROM installation]

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

Step 9: Tap 'choose zip from sdcard' and go to Android 5.1.1 Lollipop ROM .zip file in the SD card and enter the installation process. Repeat the same 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 re-start the device by opting 'reboot system now' seen in the recovery menu.

Your device (LG-Google Nexus 4) will now take a few minutes to complete the booting process.

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

[Credits: CyanogenMod]

Also read