Sprint HTC Evo 4G LTE come with excellent specs that more than enough to run an Android 4.1 update, with Qualcomm 1.5 GHz S4 dual-core processor, 1 GB RAM and 16 GB of storage, I’m sure there’ll be no problem for this android phone to run it. However, until now there’s no official word when Jelly Bean update roll out for this smartphone, for those of you who want to experience the JB update earlier you can install a custom ROM like CyanogenMod (CM10), AOKP, MIUI, etc.
Sure it requires technical skills and it’s recommended for experienced users only, because this procedure can lead to bricked or damaged device. For novice users, we try to write a beginners guide how to install Android Jelly Bean for those who have never been to modify their HTC Evo 4G LTE:
Unlocking Bootloader and Getting Root Permission on Sprint HTC Evo 4G LTE (Jewel)
- Ensure phone drivers and Android SDK already installed on your PC, follow this guide to install it on Windows.
- Confirm your device has unlocked bootloader, you should check into bootloader. Turn off your phone, after getting completely off press and hold the volume button + power button, and you will enter bootloader mode. If you’re still locked then the bootloader details will be shown just like an image below:
- Unlock process can be done through HTCDev, you should select “All Other Supported Models” in the Supported Devices, a complete guide to unlock HTC Evo 4G LTE bootloader can be found here.
- Once your device unlocked, device bootloader details will be shown TAMPERED – UNLOCKED:
- After unlocking bootloader, the next step is to install/flash a custom recovery. On your PC go to the folder “platform-tools” inside Android SDK installation, hold down the Shift key on the keyboard and then right-click and select “Open command window here”.
- Get your device, enter into bootloader mode as step 1, and then select Fastboot using power button. Connect your phone with a USB cable, so it changed into Fastboot USB.
- Download the latest TWRP custom recovery, find the link to download “openrecovery-twrp-2.2.x.x-jewel.img” or newer version and move the file into “platform-tools” folder on your computer. Back to CMD, type the command below:
- After a successful flash recovery, download flashable SuperSU app and move into your phone’s sdcard. After that grab your phone and go back to Bootloader mode (see step No. 2), scroll down to RECOVERY and you will enter into TWRP recovery, select Install, find the CWM-SuperSU-v0.87.zip file and swipe to flash.
- Reboot, now your device is HTCDev unlocked and rooted.
OKAY [ 1.125s]
OKAY [ 1.945s]
finished. total time: 3.070s
Flashing a custom Jelly Bean ROM on HTC Evo 4G LTE
- Download an Android 4.1 custom ROM for Evo LTE device and copy the file on sdcard, if you’re still S-ON you are advised to install the kernel via fastboot before flash a ROM, since there is chances you will get bootloops.
- On your PC open the ROM file (zip) that has been downloaded with 7-zip/WinRAR, find “boot.img” file and extract/unzip the file to the platform-tools folder.
- Go to the platform-tools folder, press shift + right click > “Open command window here”, and run the following command:
- Enter into custom recovery (TWRP) via the bootloader (see unlocking and rooting steps no. 2 above), and select RECOVERY.
- Perform Nandroid backup, select Backup on the TWRP recovery menu.
- Clearing previous ROM’s data and cache, select Wipe > Factory Reset then Cache and Dalvik Cache.
- Return TWRP main menu, select “Install” find and choose a Jelly Bean ROM that has been downloaded before, and Swipe to confirm flash.
- Select Reboot System and your phone will reboot.
- You should boot Android 4.1 ROM now.
/strongcenter app and move into your phone’s sdcard. After that grab your phone and go back to Bootloader mode (see step No. 2), scroll down to RECOVERY and you will enter into TWRP recovery, select Install, find the CWM-SuperSU-v0.87.zip file and swipe to flash.