How to Install Android 5.1.1 Lollipop on Galaxy S4 LTE (GT-I9505) via SlimLP custom ROM

Android 5.1.1 Lollipop is now available for the Samsung’s ageing flagship device Galaxy S4 LTE (GT-I9505). Thanks to the most popular Slim ROM, SlimSaber and JDCTeam developers for releasing the Android 5.1.1 SlimLP ROM and you can now taste the latest 5.1.1 Lollipop on your Galaxy S4 via SlimLP custom ROM which is a fast, stable and extremely lightweight package.

Android 5.1.1 SlimROM comes with a lot of amazing and best features taken from the famous custom ROMs like CyanogenMod, SlimROMs and SlimSaber ROMs for smoother and faster performance. So if you are interested to install Android 5.1.1 SlimLP custom ROM on your Galaxy S4 LTE (GT-I9505) then go ahead and follow the given step-by-step guide. Please note that SlimLP is a custom ROM which is not officially released by Samsung, so you’ll need a custom recovery like CWM or TWRP in order to install the ROM and Google Apps package on your Galaxy S4. Many users have tested this ROM and found it compatible with all Galaxy S4 models running Snapdragon 600.

Here we’ve given the list of supported models of Galaxy S4:

  • GT-I9505
  • GT-I9505G
  • GT-I9507
  • GT-I9508
  • Any SCH-I545
  • Any SCH-R970
  • Any SGH-I337
  • Any SGH-M919
  • Any SPH-L720


This guide containing the Android 5.1.1 SlimLP custom ROM and instructions can be used only with the Galaxy S4 GT-I9505 (International variant). Check the model number of your device first by navigating to Settings > About Phone.

Warning: will not be held responsible for any kind of damage or mishap occurred to your Galaxy S4 GT-I9505 during or after the installation of Android 5.1.1 Lollipop SlimLP custom ROM. Proceed at your own risk.

Before Getting Started:

  • Make sure that you’ve taken proper backup of all your important data and settings on your device before proceeding to the installation of this custom ROM using a recommended custom recovery like ClockworkMod recovery. In case anything goes wrong then you’ll be able to restore your data.
  • Enable USB Debugging mode by navigating to Settings > Developer Options.
  • Make sure that you’ve properly installed USB Drivers for the Galaxy S4 I9505 on the PC.
  • Your Galaxy S4 should be rooted with the latest version of CWM recovery already installed.
  • The Bootloader of the phone should be unlocked.
  • Verify the battery level of your Galaxy S4, it should be charged at least about 80% before going ahead to the installation instructions to prevent unexpected shutdowns while the firmware installation.

Required Files:

Steps to Update Galaxy S4 I9505 to Android 5.1.1 Lollipop via SlimLP custom ROM:

Follow the given instructions to install the latest Android 5.1.1 Lollipop custom firmware on on your Galaxy S4 via SlimLP ROM:

Step No 1:- First, download Android 5.1.1 SlimLP custom ROM ( for Galaxy S4 (I9505) on the desktop of the PC.

Step No 2:- Plug your device to the PC using its USB data cable and mount its USB memory storage.

Step No 3:- Transfer Android 5.1.1 SlimLP custom ROM .zip file which you’ve already downloaded from the above link, to the root folder of your SD card on the phone.

Step No 4:- Unplug the Galaxy S4 (I9505) from the PC and power it OFF in order to boot into Recovery Mode.

Step No 5:- Power ON the device while pressing and holding Volume Up + Home + Power buttons at the same time to enter into Recovery Mode.

Step No 6:- While your device is now in CWM Recovery, perform wipe data/factory reset, wipe cache partition and wipe dalvik cache also by navigating to Advanced > Wipe Dalvik Cache.

Note:- wipe dalvik cache will help you to prevent boot loops and other errors while ROM installation.

Step No 7:- Go back to the main Recovery Menu and choose install zip from SD card → choose zip from sdcard.

Step No 8:- Navigate to the Android 5.1.1 SlimLP custom ROM .zip file which you’ve already transferred to the SD card of your device previously. Select the ROM .zip file using the Power button and confirm the installation to begin.

Step No 9:- Navigate to +++++Go Back+++++ once the installation is completed. From Recovery Menu, reboot your device by selecting reboot system now.

Your Galaxy S4 GT-I9505 will be rebooted and may take about 4 to 5 minutes to boot for the first time after installation.

Done! You’ve successfully updated Galaxy S4 I9505 to Android 5.1.1 Lollipop via SlimLP custom ROM.

Let us know in the comments area below if you have any question or trouble while installing SlimLP ROM featuring Android 5.1.1 Lollipop on your Galaxy S4.

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