T-Mobile Galaxy S3 users can now install a new custom ROM based on Android 4.1 Jelly Bean named as HellFire, thanks to XDA Recognized Developer x0xhellx0x. HellFire ROM is based on CyanogenMod 10 ROM with some new features such as Titanium backup, DropBox, Fancy Widget and more. It is not an official ROM from Samsung and since the ROM is in development stage there may be bugs.
The guide is only for T-Mobile Galaxy S3 SGH-T999 and should not be tried on any other device. You can find model of your device by going to Settings >> About Phone
We cannot be held liable for any loss or damage done to your device while following the guide.
Install Android 4.1 Jelly Bean HellFire ROM on T-Mobile Galaxy S3
Take a complete backup of data,apps and settings as the procedure may wipe your data.
Make sure that the battery of device has a minimum charge of 60%.
Enable “USB debugging” on your device by going to Settings >> Developer options >> Enable USB debugging.
Install Clockwordmod recovery on your device.
Download HellFire ROM on your device from here and copy the file to SD-Card of your device without extracting.
Switch off device and enter into recovery mode. Hold power button and volume down button and enter recovery.
Take a Nandrop backup. Select “Backup and Restore” and then select “Backup again”.
Select “wipe data/factory reset” and wait till the data gets wiped.
Select “install zip from sdcard’and then select “choose zip from sdcard”.Navigate to the ROM file which you have downloaded and confirm to “install”. Wait for few minutes till the installation gets complete.
In Recovery Menu select “Advanced” and then select “Fix permissions”. Select “Go Back” and then select “Reboot System Now.”
HellFire ROM based on Android 4.1 Jelly Bean is installed on your T-Mobile Galaxy S3.