How to Update HTC Evo 4G with Cyanogen Mod 7.1 Custom ROM

Sanjana January 9, 2012 0

Cheers to HTC Evo 4G users as they can now update their phone with the latest Cyanogen Mod 7.1 version firmware without any hassles by following the detail updation procedure that we have covered in this article. However it is to be noted that for applying this update you need to root your phone which will in turn void the phone’s warranty. You ought to reapply the stock update and relock the boot loader if you want to reclaim back the lost warranty.

htc evo 4g

We wont be responsible for any harm caused to your device during the updation procedure that is unlikely to happen if you follow the instructions carefully. The updation procedure is only applicable to HTC Evo 4G smartphones that are network unlocked so do not try it in any other devices as it might not be reversible and will harm the device by blocking it.

Let’s take a glance at some of the enhancements that come with this Cyanogen Mod ROM.

Enhancements of Cyanogen Mod 7.1 ROM:

  • The firmware is based on AOSP Kernel and Gingerbread 2.3.7 and has Stock version of
  • Supports the latest 3.16 version of Android Market
  • Better battery backup
  • Improved range of wallpaper package with cyan colored interface with stylized icon sets
  • Quadrant rank has been increased to a whopping 50%
  • Improved app management tools and facilities since it supports a number of folder lock applications that was absent earlier


You ought to backup all the user data present in your phone since chances of data loss or corruption are there. Having a backup can help you replace the lost data if any damage occurs. Follow the link posted below to backup and restore all your data easily.

Pre Upgrade Instructions for Rooting and Firmware Update

Must Have:

Download HTC Sync DriversDownload Google AppsDownload Cyanogen Mod 7.1 for HTC Evo 4GDownload ROM Manager

Before proceeding to install Cyanogen Mod 7.1 in your HTC Evo 4G you have to turn the S Off and root your smartphone. We have discussed each of the procedures in detail.

Steps to S Off and Root HTC Evo 4G:

Step-1: Enable USB Debugging from the path “Settings > Applications > USB Debugging” then download and install HTC Sync Drivers in Windows computers since Linux or Mac based computers are not yet supported. Now disable the fast boot by following the path “Settings > Power > Fast boot”.

enable usb debugging

Step-2: Browse the HTC Beta generator Key site where you will come across an option of  ”Download for Windows” and a file will be prompted to be downloaded. Download it and a notification called “Beta Key” will appear where you need to fill in the details like your operating system, device name, HBOOT version and serial number of your phone. Once you are done, click on “Generate Key”.

beta key generate

Step-3: Connect your device to the computer via USB cable and open the revolutionary beta application downloaded from the above link. Now enter the correct beta key that you got in the above process. The custom recovery image gets installed and S Off is easily achieved thus the phone is rooted successfully.

Thus you can easily root your HTC Evo 4G by following the above mentioned steps carefully.

Now lets proceed into the procedure on how to install Cyanogen Mod 7.1 in your HTC Evo 4G.

Steps to Install Cyanogen Mod 7.1 Custom ROM in HTC Evo 4G:

Basically there are two methods to install this custom ROM in your HTC Evo 4G phone. First is by Recovery mode and another one is by using ROM Manager method. It is suggested that you opt for Recovery mode method and if this fails you can then go for updating via ROM Manager. Let’s go through both the procedures in detail.

Recovery Method:

Step-1: Download Cyanogen Mod7.1 Custom Firmware and Google Apps mentioned in the Must Have section to your computer and connect your HTC 4G to the computer or laptop. Copy both the downloaded files to the root of your phone’s SD Card. Do not place them deep into any folders else your phone won’t be able to detect the updated file.

Step-2: Power off your phone to enter into Recovery Mode by pressing the Volume Down button and Power button simultaneously. In Recovery mode select the option of “Clear Storage” to clear off all cache files present in your phone. Now choose ”Install zip from SD Card” > “Choose zip from SD Card” and select the file named as ” ” from the list of files displayed.

recovery mode

In case you receive an error message as “E: Signature Failed” it indicates that the phone has not been rooted properly and you have to re-apply the rooting procedure again.

Step-3: Now again select ”Install zip from SD Card” > “Choose zip from SD Card” to select the Google Apps Zip file kept in your phone. After the updation process is complete, you will again land up in Recovery mode. Now choose “++++Go Back++++” then “Reboot system now” option to restart the phone.

If you face any issues during the updation process then re-insert the battery and re-apply the whole procedure again from the beginning. If you are still unable to update then follow the ROM Manager method as mentioned below.

ROM Manager Method:

Step-1: Download and install ROM Manager Application in your phone from the Must Have section. After installation is complete, choose the option of Back up ROM so that in case any mishap occurs during the firmware updating process then you can restore the original ROM at any point of time.

Step-2: Open ROM Manager and you will now come across a list of options. Select “Install zip from SD Card” > “Choose zip from SD Card” and choose the file named as ” ” from the list of files displayed.

Thus you can easily update your HTC Evo 4G with Cyanogen Mod7 update by following the steps mentioned above carefully.

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