Samsung Galaxy S4 displayed during the launch
[Representational image] Samsung Galaxy S4 (LTE) gets Android Marshmallow update via crDroid custom ROM [How to install. Pictured: Samsung Galaxy S4put on display during the official launch in the New York City on 14 March,2013Reuters

The Android Marshmallow-based custom crDroid ROM has been made available to Samsung's 2013 flagship smartphone Galaxy S4 LTE.

The Galaxy S4 series was officially updated to Lollipop OS in early 2015 and is not eligible to get another OS update as it is more than two years old. Samsung has the obligation to provide firmware support for its devices for 18 months (or maximum of 24 months in exceptional cases), after they are released to the market.

Those still hanging on to the former flagship smartphone can upgrade their Galaxy S4s by installing the crDroid custom ROM.

It comes with the Doze power optimization feature, the new "Now on Tap" search option, boot security system, and support for more international languages. In addition to Android M features, crDroid ROM brings new personalisation options and performance-enhancement tweaks.

Read more: Google Android 6.0 Marshmallow: 7 key features you need to know

Prerequisites (things to remember before installing Custom ROM)

  • This new Android 6.0 Marshmallow crDroid custom ROM has to be installed on Samsung Galaxy S4 LTE GT-I9505 (jfltexx) international LTE models only, if tried on other devices, it might brick them [to check your device model: Go to Settings >> About phone >> model number].
  • 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].
  • Make sure the device is rooted before going ahead with custom ROM installation.
  • Installation of custom ROM requires clearing memory in the phone, so make sure to back all the data by installing Clockwork Mod (CWM) Recovery/ TWRP in the smartphone.
  • Make sure USB driver is installed on the PC or else your device (Galaxy S4 LTE) 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.

[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.]

Tutorial: Step-by-step installation procedure for Android 6.0 Marshmallow crDroid custom ROM on Samsung Galaxy S4 LTE (GT-I9505)-

Step 1: Download Android 6.0 Marshmallow crDroid custom ROM and Google Apps on to your PC.

Step 2: Connect Samsung Galaxy S4 (GT-I9505) to PC via USB cord.

Step 3: Then, place Android 6.0 Marshmallow crDroid custom ROM 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/TWRP tool.]

Step 4: Turn off the device and disconnect from the PC.

Step 5: 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 6.0 Marshmallow ROM .zip file in SD card and enter the installation process. Repeat the same procedure for Google Apps installation [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 S4 GT-I9505) will take a few minutes to complete the booting process.

Users then head to Settings >> select About phone to confirm the installation of Android 6.0 Marshmallow crDroid custom ROM.

Downloadable files:

Android 6.0 Marshmallow crDroid custom ROM: HERE

Google Apps: HERE

USB Driver: HERE

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