Samsung Galaxy S5
New Samsung Galaxy S5 smartphones are seen on a display at the Mobile World Congress in BarcelonaReuters / Albert Gea

Popular smartphone mobile software developer Cyanogen has released the new CM12.1 series custom ROM for Samsung's 2014 flagship smartphone Galaxy S5.

CyanogenMod CM12.1 is free of Samsung's TouchWiz UI and other bloatwares; it provides more control over the device and provides many customization options to the users.

New features of the CM12.1 firmware include a new email app powered by Boxer, which brings multiple account support, exchange support and canned responses for quick replies, sound alerts (bells or whistles), option to select different LED colour display for email notifications. It also comes with bug fixes to previous v5.0.2 OS.

Prerequisites (things to remember before installing Custom ROM)

  • Though installing custom ROM improves the device's performance and UI experiences, it makes the company warranty void and they will no longer be liable to provide updates in future [users can restore warranty by flashing the device with stock-ROM].
  • Make sure the device is rooted before going forward for custom ROM installation.
  • This new CyanogenMod [official] CM12.1 series Android 5.1 Lollipop firmware has to be installed on the Samsung Galaxy S5 -klte - models only; if tried on other devices, it might get bricked [To check your device model: Go to Settings >> About phone >> model number]
  • 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 they have installed USB drivers on the PC, or else your phone (Samsung Galaxy S5) smartphone will not be recognized by the computer.
  • Make sure your device has more than 80 percent battery, or else there is chance of smartphone getting temporarily bricked if the installation process is interrupted in the 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 procedure of CyanogenMod [official] Android 5.1 Lollipop CM12.1 Custom ROM on Samsung Galaxy S5 (klte) models:

Step 1: Download CyanogenMod [official] Android 5.0 Lollipop CM12.1 series Custom ROM (HERE) and Google Apps (HERE/HERE/HERE) in to your PC.

[Note: custom ROM build-date: 29/04/2015]

Step 2: Connect Samsung Galaxy S5 to PC via USB cord.

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

Step 3: Then, place Android v5.1 Lollipop CM12.1 custom ROM 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/TWRP 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 selecting '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 choosing '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 5.1 ROM .zip file in SD card and enter the installation process. Once again reboot to Recovery mode and then flash Google Apps .zip file [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 (Samsung Galaxy S5) will take a few minutes to complete the booting process.

Users then head to Settings >> select About phone to confirm the installation of CyanogenMod [official] Android 5.1 Lollipop CM12.1 custom ROM.


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