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Update Sprint HTC Evo 4G LTE to Stock Android 4.1.1 Pre-Rooted Jelly Bean Firmware

The new update to Android 4.1.1 has been launched for the Sprint variant of HTC Evo 4G LTE. This is a ROM build of stock Android 4.1.1 and it is already rooted. Use all the info that I have listed in this post and you should be to complete the tutorial in no time. Use all the instructions that I have listed in this article and make sure not to skip any of the steps, as that will result in a failed attempt of updating your device.

The HTC Evo 4G LTE can be upgraded to Android 4.1.1 and, by doing this, you will get the new and improved Google Now, revamped Google Apps, Project Butter and multiple other HTC based functions. This is an already rooted firmware and it is destined for users who wish to get root access and access all the other functions of your device, as well as getting the stock Android 4.1 experience.

This rooted Stock Android 4.1.1 JB update has been released by ‘viperboy’, a ROM developer and an XDA member. In order to correctly install this update at your first attempt, you will need to read the preparation guidelines below:

  • Use this guide only with the Sprint HTC Evo 4G LTE smartphone. Do not try to install it on any other Android device, as you will end up bricking it.
  • Your smartphone should be on an unlocked Bootloader. You cannot install the new ROM on a device with a locked bootrom.
  • Despite this Android 4.1.1 ROM update is already rooted, you will still need to flash it on an already rooted device. Here you can find guides that can help you with that. This guide HERE will root the smartphone and it will also install the TWRP Recovery, which is what you’ll use to flash the update.
  • Since this is a rooted firmware, then you will need to know that the warranty is voided. You can restore the warranty only if you install an official HTC Android 4.1 firmware.
  • Charge the phone’s battery so that it won’t power off in the middle of the updating process.
  • Enable USB debugging option from the Development menu.
  • Create a NANDROID backup of the currently installed ROM. This will act as a cover in case something goes wrong and your device cannot boot with the new Android 4.1.1 stock rooted firmware.
  • Read the entire article and when you’re ready you should begin the update.
  • Use the comments section if you cannot complete the installation adn I will try to come up with a solution to your problems.

These were all the guidelines you had to read and now you can get to the tutorial. Apply all the steps listed and make sure that you don’t skip any of the steps I’ve listed.

How to install Stock Rooted Android 4.1.1 Jelly Bean ROM on Sprint HTC Evo 4G LTE:

  1. Download the ROM zip file from HERE. Don’t extract its contents and place it on your desktop.
  2. Connect the smartphone to PC via USB cable. Move the rooted ROM zip on its internal sdcard. Disconnect the smartphone when the transfer is complete.
  3. Power off the phone now and then boot it into Bootloader Mode. It can be done by pressing at the same time ‘volume down’ and ‘power’ buttons.
  4. Choose the ‘RECOVERY’ option from the bootloader mode menu. Press ‘power’ button to boot your phone into TWRP Recovery mode.
  5. If you don’t have a ROM backup of your current Android OS, then you should select the ‘backup’ option from the Recovery menu and create such restore point. When the backup is finished move to the next step. Also, skip this step if you already made such backup before getting to the tutorial.
  6. Now, choose ‘wipe’ and after that select ‘Factory Reset’ option. Confirm this process. NOTE: It won’t delete the contents of the internal SD card. However, the /system partition will be removed and this means that all applications, SMS, Call Logs and other data stored on it will be deleted in the process.
  7. Next, select ‘Install’ and then find the stock rooted Android 4.1.1 JB firmware and confirm that you want to update your phone.
  8. Now you need to wait until the update is finished. When that happens you should return to the main menu of TWRP Recovery.
  9. Select ‘Reboot System’ option and then wait until the phone boots successfully with this new ROM.
  10. Test the new ROM and tell us in comments which are your favorite new Jelly Bean functions and features.

NOTE: The first boot process with this new ROM shouldn’t take more than 5 minutes. If it takes more than that, then you should power off the device and after that you will need to repeat the entire tutorial once again until you will manage to flash the new firmware update.

If you don’t like this new ROM, then you can still use the TWRP Recovery and restore the backup of your formerly installed Android OS. For more questions please post in comments.

HTC EVO 4G LTE Sprint Articles