The T-Mobile (NYSE:PCS) variant of Samsung Electronics Co. Ltd.’s (KRX:005935) Galaxy S2, with the model number (SGH-T989), can now be upgraded to the latest Android version by installing the LiquidSmooth custom ROM, which is developed with the help of Android 4.4.2 KitKat, based on the Android Open Source Project.

The LiquidSmooth ROM is said to increase the performance and overall smoothness of the OS. The ROM also includes a theme engine, which allows users to choose from a set of skins to apply over the user interface, according to Team Android.

The LiquidSmooth custom ROM has many new features, such as custom animation controls, privacy guard, working Wi-Fi tethering and lock-screen notifications to name a few. For a full list of features, click here.

The LiquidSmooth ROM is not an official release by Samsung, so users need to root their device before flashing the firmware. The device is also required to have a custom recovery such as ClockworkMod to flash the ROM zip.

Here are some more points that users need to know before trying out the ROM:

- Users must have proper back-up for their personal data on the phone.

- The handset should have at least 80 percent of battery power.

- The USB drivers for the Galaxy S2 must be installed in the computer.

- The users also need to ensure that USB Debugging is enabled on the phone.

- During the installation, if the device gets stuck on booting, users can perform wipe cache partition and wipe dalvik before rebooting the device.

- The process is only for the T-Mobile Samsung Galaxy S2 (SGH-T989).

Note: International Business Times cannot be held responsible if anything goes wrong. Users should proceed at their own risk.


Step 1: Download LiquidSmooth custom ROM based on Android 4.4.2 KitKat and Google Apps for Galaxy S2 to your computer.

Step 2: Connect the Galaxy S2 to the computer via USB and copy the ROM and Google Apps packages to the root folder of the handset’s SD card without extracting them.

Step 3: Disconnect USB and turn off the Galaxy S2.

Step 4: Get into the Recovery Mode by pressing and holding Volume Up, Home and Power buttons at the same time.

Step 5: In the Recovery Mode, perform a factory reset by selecting “wipe data/factory reset.” Use the Power button to select options. After that, perform a cache wipe by selecting “wipe cache partition.”

Step 6: Wipe the dalvik cache as well. To do this, go to “Advanced” menu From CWM recovery and select “wipe dalvik cache.”

Step 7: Now, go back to the main recovery screen and select “install zip from sdcard” and then select “choose zip from sdcard.”

Step 8: Use the Volume keys to go to the Android 4.4.2 ROM zip file, which was copied to the SD card and select it using the Power button.

Step 9: Repeat Step 7 and Step 8 to install Google Apps.

Step 10: Once the installation is complete, press the “+++Go back+++” button to go back to the main recovery menu and select “reboot system now.”

[Source: Team Android]

The Galaxy S2 will reboot after the entire process is complete. The first boot will take some time.