Those who missed the latest OTA update notification on their Nexus tablet or cannot wait for its official release can still install and root the same manually, using this guide.
Those already running on Android 4.4 KRT16S firmware can install this OTA update. This tutorial has three sections: the first is for non-rooted Nexus 7 (2013), the second for rooted Nexus 7 (2013), and the third for rooting Nexus 7 (2013) on the newly installed Android 4.4.1 KOT49E KitKat update.
IBTimes UK reminds its readers that it will not be held liable for any device damage during firmware and/or root installation. Users are advised to proceed at their own risk.
1. Install USB Drivers for Asus Nexus 7 on computer.
2. Enable USB Debugging Mode on the tablet by navigating to Settings >> Developer Options.
3. Back up all your important data before proceeding with firmware installation.
4. Ensure the phone is factory unlocked and not rooted. NOTE: For rooted procedure, just ensure the device is factory unlocked as well as its bootloader unlocked. Also verify that the device is pre-rooted with custom recovery (CWM or TWRP) installed.
5. Verify the tablet has at least 80% battery charge to prevent unexpected device shutdown during firmware installation.
6. The Android 4.4.1 KOT49E KitKat firmware works only on the Nexus 7 2013 (Wi-Fi and LTE). Attempting to install this firmware on incompatible models may inadvertently brick the device. Verify the model number of the device by navigating to Settings >> About Tablet.
7. If the device is stuck at booting or experiencing boot loop issues, perform Wipe Cache Partition and Wipe Dalvik Cache a few more times before rebooting.
8. Allow newly installed ROM to stabilise for five minutes before you start working on it.
How to Install Official Android 4.4.1 KOT49E Bug-Fix Update on Nexus 7 2013 [Non-Rooted]
Step 1: Download Android 4.4.1 KOT49E Bug-Fix update for Nexus 7 based on the model number to computer and rename the file as update.zip.
Step 2: Connect and mount the Nexus 7 USB mass storage on computer using USB cable.
Step 3: Copy the update.zip file to the root folder on your tablet.
Step 4: Power off the tablet and let it boot into Bootloader Mode. To do so, press and hold the Volume Up and Power buttons together until the Fastboot menu with START icon appears on screen.
Step 5: Follow the onscreen navigation instructions and then tap Volume Up button several times to enter Recovery mode. Then hit Power button to confirm progress into recovery.
Step 6: An exclamation mark should now appear on the tablet screen. Once again press and hold the Volume Up and Power buttons together to enter recovery.
Step 7: Choose update from SD card option and then select update.zip file using Power button. The firmware installation should now begin.
Step 8: Once the Android 4.4.1 KOT49E firmware is completely installed, the tablet will automatically reboot. It may take about 5 minutes for first boot to complete. So, do not interrupt the process.
Your Nexus 7 2013 is now updated to the latest Android 4.4.1 KOT49E KitKat bug-fix update. Go to Settings > About Tablet to verify the firmware version installed.
How to Install Official Android 4.4.1 KOT49E Bug-Fix Update on Nexus 7 2013 [For Rooted]
Step 1 - Download Android 4.4.1 KOT49E Bug-Fix update for Nexus 7 2013 based on the model number to computer, if you haven't already.
Step 2 - Connect and mount your Nexus 7 USB mass storage on computer using the USB cable.
Step 3 - Copy the Android 4.4 zip file to root folder on your tablet's internal storage.
Step 4 - Switch off the tablet.
Step 5 - Boot the device into Bootloader Mode. To do so, press and hold the Volume Up and Power buttons till the Fastboot menu and START icon appear on screen.
Step 6 - Follow the onscreen navigation instructions and then tap Volume Up button several times until the RECOVERY menu appears. Then hit Power button to select it.
Step 7 - In ClockworkMod recovery, browse and select "flash zip from SD card" option and tap Power button to select it.
Step 8 - Hit the Power button again and select "choose zip from sdcard".
NOTE (Optional): You can turn OFF signature verification from the "toggle signature verification" option to avoid conflicts during firmware installation.
Step 9 - Use volume keys to navigate to firmware zip file and select it using the Power button. Confirm the firmware installation on next screen and the installation process will begin.
Step 10 - Once the firmware is installed, go to "+++++Go Back" and reboot the phone by selecting "reboot system now" from the Recovery Menu. The phone will reboot now and it may take about 5 minutes for first boot to complete. So, please be patient.
Your Nexus 7 2013 (Wi-Fi and LTE) is now running on official Android 4.4.1 KOT49E Bug-Fix update. Go to Settings > About tablet to verify the firmware installed.
Now that you have installed the latest Android 4.4.1 KOT49E bug-fix update on your Nexus 7, you can root the same using SuperSU tool with CWM or TWRP recovery.
How to Root Nexus 4 on Android 4.4.1 KOT49E Bug-Fix Update
Step 1 - Download Android SDK from the Android Developers website and install with USB drivers.
Step 2 - Download Fastboot and extract it to android-sdk-windowsplatform-tools directory. Create a new directory if it does not exist.
NOTE: Skip Steps 1 and 2 if you already have them.
Step 4 - Download SuperSU v1.80.zip for Nexus 7 2013 on computer.
Step 5 - Connect and mount your Nexus 7 USB mass storage on computer with USB cable.
Step 6 - Now copy/paste the UPDATE-SuperSU-v1.80.zip file to the root folder on your tablet's internal storage.
Step 7 - Power off your phone.
Step 8 - Download CWM 18.104.22.168 or TWRP 22.214.171.124 and save it to the android-sdk-windowsplatform-tools directory on computer.
NOTE: Use any of the two custom recoveries: CWM or TWRP, depending on your requirement.
Step 9 - Boot the phone into Bootloader Mode. To do so, press Volume Down and Power keys for a few seconds until some text appears on the screen, which confirms entry into Bootloader Mode.
Step 10 - Navigate to android-sdk-windowsplatform-tools directory and open Command Prompt (press Shift and then right-click on empty space to open Command Prompt).
Step 11 - Type in the following command and press Enter:
fastboot flash recovery recovery-clockwork-touch-126.96.36.199-flo.img
Step 12 - Once the command is executed, choose RECOVERY option from the Fastboot menu and boot the tablet into Recovery Mode.
Step 13 - In ClockworkMod recovery, navigate to "flash zip from SD card" option and hit power button to select it.
Step 14 - Tap the Power button again and select "choose zip from sdcard".
Step 15 - Use volume keys to navigate to UPDATE-SuperSU-v1.80.zip and select it using Power button. Confirm the root installation on next screen and the installation process will begin.
Step 16 - Once the root installation is done, hit "+++++Go Back" and reboot the device by selecting "reboot system now" from the Recovery menu. The tablet will reboot now and it may take about five minutes for first boot. So, please be patient and do not interrupt the process.
Your Nexus 7 2013 is now rooted on Android 4.4.1 KOT49E bug-fix update. Check for the SuperSU app in your apps list to verify the root installation.
To ensure the root is installed correctly and working as expected, download and install Root Checker app from Google Play Store.
MUST READ: Android 4.4.2 KOT49H Bug-Fix Update Rolls Out for Nexus 7 (2013) [How to Install and Root]
[Source: Team Android - Install / Root]
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