Update AT&T HTC One to Android 4.4 KitKat with CM 11 ROM



If we rank worls’s most beautiful smartphones, HTC One will top the list. It is no exaggeration that HTC One is the most beautifully designed smartphone yet. Standing ovation given to HTC One’s beautiful aluminium design proved its worth. This beauty is actually a beast inside. It supports a Full HD 1080p display, measuring 4.7″ diagonally. It has one of the highest ppi’s yet which is 469. Now this is something serious!! Watching experience on HTC One is one of the best i have ever had.

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This phone runs a Qualcomm APQ8064T Snapdragon 600 based Quad-core 1.7 GHz Krait 300 processor with Adreno 320 GPU. 2 GB Ram is more than enough for smooth mutitasking. With 2300 mAh battery, it provides a talk-time of upto 18 hrs on 3G, which is one of the highest talk-times we have yet witnessed. Another very distinctive feature of HTC One is its camera. It is a 4 MP UltraPixel camera. HTC claims that it can capture 300% more light than other lenses, which is absolutely correct. It shot amazing low light photos, giving other phones a tough competition.

HTC one is one of the first few lucky phones to get chocolaty KitKat treatment by CyanogenMod team. CyanogenMod team, like always has come up with latest Android update for your device. CyanogenMod is an open-source project which allows us to enjoy latest version of Android before it is officially released. It is based on official ROM by Google. It also contains some useful features that are not included in official ROMs. CyanogenMod ROMs have always been a pleasure to use. They are quite smooth and stable custom ROMs. They have also introduced CyanogenMod InstallerBe sure to check it out.

Note that this guide is only for AT&T HTC One


1. ADB and Fastboot Drivers:

DB stands for “Android Debug Bridge”. ADB is essential to establish a connection between you android device/android emulator and PC. If you are a developer, or an android device owner, who wants to mess with his android then you will need ADB & Fastboot installed on your PC. ADB and Fastboot drivers are essential to detect your device while it is connected to computer. Without these, you may find it difficult to root your device. If you do not know how to install ADB and Fastboot Drivers, Vist our Guide for this purpose.

For everything related to Android from now on, you will need ADB and Fastboot. That is why it is essential to set up these tools before proceeding. You have to do it only once, and then use them forever. Visit following link to learn how to do it.

 How to Install ADB and Fastboot Drivers – TechGlen

2.HTC One USB Drivers:

After you have installed ADB and Fastboot drivers, connect your device to computer. It will download and install essential USB Drivers itself. Download and install HTC Sync manager and then connect your smartphone to computer via a USB Cable. It will install all drivers automatically.

HTC Sync Manager

3.Battery must be charged over 50%:

Rooting and updating process is very crucial. Any mistake can lead to a mishap. One of the most common mistakes is low battery. It poses a threat while rooting process is going on and phone shuts down due to low battery. Always remember to keep your phone charged above 50% to avoid any such mishap.

4.Check your Phone Model:

Always confirm that the guide you are following is for your device. You can learn about your device’s model name by navigating to Settings>About Phone. After you have confirmed your phone model, you can proceed further.

5.Do not turn off Computer during Updating Process:

This mistake has same effects as having low battery on your device. That is why be careful to keep your computer plugged in during whole process.

6.Backup all your important Data:

Normally, rooting process does not wipe out your data but to be on the safe side, it is advisable to backup your data so that you can recover it in case of data wipe. If you are using a SD Card, remove it before rooting and insert it again after rooting has been done. Backup all data on internal storage on your computer. Backup messages and contacts by using methods described above. Follow this BACKUP GUIDE. If your device is rooted, BACKUP DATA WITH TITANIUM BACKUP.

If you already have TWRP or CWM recovery on your device, then you should make a Nandroid Backup. In case something goes wrong or you don’t like new update, you can easily go back to previous ROM easily.

6.Be careful to use correct file for updating:

Sometimes we have lots of files, having similar names put together in same folder. Accidently, we can use a wrong file which can result in bricking device. Therefore, it is advisable to put specific files for your device in a separate folder. This way, you will not be mistaken.

7.Get Developer Options Enabled:

In android 4.2.2, developer options are hidden. Developer option are provided for development purposes like rooting itself. It is second-last tab but you may not find it yet. To activate Developer Options you need to navigate to Settings>About Phone. Tap build number about 7  times until you get a popup saying your are a developer. In Android 4.1.2, developer options are already visible.

8.You need or higher CWM recovery:

This update method will only work with CWM recovery or higher. You cannot use a TWRP recovery, otherwise you will end up in a bootloop. To get latest CWM recovery on your HTC One, download Rom Manager  from Play Store and it will automatically install CWM recovery on your smartphone.


Remember that all processes like rooting, flashing and manual updating are custom methods. They have no concern with Google of mobile manufacturer. Follow every step carefully to avoid any mishap. Owner of site will not be held responsible in case of any mishap. Do it at your own risk. Rooting and flashing custom ROMs will also void warranty. 

Unlock Bootloader before proceeding further

Bootloader is locked by default in all smartphones and tablets. With a locked bootloader, you cannot install custom kernel on your smartphone. Flashing a custom kernel with locked bootloader may result in bricking the device. Therefore, you need an unlocked bootloader to flash CyanogenMod on your mobile.

Visit following link to unlock bootloader of your HTC One:

How to unlock bootloader of HTC One

Required Downloads:

  1. Android 4.4 KitKat CM 11 ROM for AT&T HTC One – Download Link
  2. Android 4.4 KitKat Gapps – Download Link


  1. Copy downloaded ROM and Gapps to phone’s memory
  2. Keep both file in ip format. Do not unip those files
  3. Reboot HTC One into CWM recovery
  4. Perform a Factory reset
  5. Wipe cache partition
  6. Now select and install CM 11 ROM for HTC One
  7. Same way install Android 4.4 Gapps
  8. Now go back to main menu and reboot the device
  9. First boot will take longer than usual


1.Bootloop error:

Reboot into CWM recovery and perform a factory reset. Also wipe cache partition and dalvik cache. Now reboot the device. If error still persists, consider re-installing the ROM. Please note that first boot will take longer. Do not consider it as a bootloop unless 5 minutes have passed!

2.No Root Access:

CyanogenMod 11 ROM may not have root enabled by default. To get root access, you need to navigate to Settings > Developer Options and enable Root access.


Apps for PC +Hayder Ameen is a Computer Science student and Android is his passion. Other than that, he is a gym addict and a great sportsman. Connect with Hayder on Facebook and Twitter Email: Hayder@TechGlen.com Site: WhatsApp For PC

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