Install DarthStalker Android 4.1.1 Custom ROM on T-Mobile Samsung Galaxy S3 T999

Update T-Mobile Galaxy S3 to Android 4.1.1 using DarthStalker JB custom ROM

DarthStalker is a custom release based on the Android 4.1.1 JB UVDLJA Firmware. It is a stable ROM for your T-mobile Galaxy S3 and if you want to install it, then you will need to read this entire tutorial.

You don’t even need an explanation regarding this ROM’s name and the only thing you need to know is that it’s rooted, zipaligned, deodexed, it comes with init.d support, battery and performance tweaks have been added along with improvements for 3G, 4G and Wi-Fi overall speed. Also, it seems like it packs the Galaxy Note 2 Polaris Office 4.0 along with Paper Artist.

If you want to correctly install the ROM and, at the same time, avoid losing any important data in the process, then you should read the guidelines below:

  • This is a tutorial guide that works only with the T-Mobile variant of Samsung Galaxy S3 model number T999. Don’t try to flash these files on any other Android device as you might end up bricking it.
  • Your phone should be rooted and running CWM or TWRP Recovery.
  • Use the custom Recovery mode and create a NANDROID backup of your currently installed ROM. This will act as cover in case you cannot boot your device after installing this new ROM. If you don’t know how to do it, then you can ask for more help in comments.
  • Also, since the tutorial will ask you to wipe data and format system, you need to create backups of SMS, Call Logs and APN Internet Settings using these tools for all Android devices: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore | AppBack for Android application. Some of these apps will ask for root access and you have to grant it.
  • To backup the Contacts details you will have to sync them with the Gmail account you’ve assigned for your smartphone.
  • Charge the SGS3 battery so that the device will not power down during the installation of DarthStalker custom ROM.
  • We can’t be blamed in case you brick the phone or you lose any data files in the process. Read the entire tutorial and only apply these changes if you’re sure that you can complete it. Don’t skip any steps listed below and make sure to use the comments section to ask for extra help.

These were all the extra steps you had to go over before getting to the ‘how-to’ guide.

How to flash DarthStalker Android 4.1.1 JB ROM on T-Mobile Galaxy S3 T999:

  1. Download the custom ROM zip from HERE. Don’t extract its contents and simply leave the file on your PC desktop.
  2. Connect the smartphone to computer. Now move the custom ROM on its internal SD card and then disconnect the smartphone from computer when the file is moved successfully.
  3. Next, power off the SGS3 completely and then boot it into a custom Recovery mode (CWM or TWRP). I’ve used CWM. NOTE: To boot into either recovery mode, press at the same time Volume Up, Home and Power; release the buttons only when the screen powers ON and the recovery menu appears.
  4. Use the ‘Backup and restore’ option to create a full NANDROID backup of your current ROM. If you already have such file, then you can skip this step.
  5. Next, select ‘wipe data/ factory reset’ and then confirm.
  6. Select ‘mounts and storage’ and then from the new menu select ‘format /system’. Confirm.
  7. When the system is formatted you need to select ‘install zip from sdcard’. Then select ‘choose zip from SD card’.
  8. Find the DarthStalker custom ROM zip and confirm that you want to install it on your device.
  9. Return to the first screen of the custom recovery mode and select ‘reboot system now’.
  10. The first boot process of this new ROM will take at least 5 minutes to complete. Wait for that and then you will be welcomed by the DarthStalker and Android 4.1.1 home screen.
  11. Enter your Google Account details and then take control over all the phone’s functions.

NOTE: If the first boot process takes too long to complete, then you will need to power off the device by removing its battery. After that you need to re-insert it and repeat the entire guide starting with step 3. Make sure that you complete steps 5 and 6.

If you don’t like this new ROM, then you can easily restore the backup of the previous ROM and get the phone to a previous working state.