The Nexus 7 is powered by one of the two chipsets at the heart of current flagship phones and tablets - NVIDIA's Tegra 3. You get a quad-core CPU and good graphics muscle at a time when the only quad-core tablets around are pricy 10" models.
The 7" screen might be a compromise to some, but others will see an advantage in the excellent portability. 7" tablets fit in a coat pocket or purse. Plus, WXGA resolution and 216ppi pixel density sound more than reasonable. For comparison's sake, an Amazon Kindle Fire offers 170ppi, and even the new iPad isn't too far ahead with its 264ppi.
Apparently there is some update available for the users. For those who have a difficult time to update the device, this article will show you some methods to mannual update the Nexus 7.
Note: everything below is working from the assumption that you’re running stock Android and not a custom ROM. If you have a custom ROM installed, you’ll have to find an updated version of that ROM to get Android 4.2.2 on your device. Otherwise you’re going to have to download your stock image from Google and install the factory image fresh (which will erase everything).
Method 1: Easy
The first thing that rooted users should try is :
1. Please going to Settings >> Apps >> All and scrolling to find Google Services Framework.
2. Tap the “Clear Data” button and confirm by tapping “OK”. From there, use the back button to get to the main Settings screen.
3. Scroll all the way down and tap About Phone, then tap System Updates.
4. You’ll see the “Check Now” button to have the device check for updates, and you should notice that the last time the device will be reporting it checked was back in 1969 (which I like to pretend is an artifact of time travel).
5. Tapping “Check Now” should result in beginning the download of Android 4.2.2 and update process for many. It will ask you to confirm that you want to install the update.
Most root users already know that updating the device will remove your root. There are a few ways around this. Clockwork Mod recovery can not only protect itself from being over-written, it can also attempt to retain your root for you. For my own devices, I prefer to use OTA Rootkeeper by Project Voodoo. As long as the update doesn’t format or overwrite the /system partition, OTA RootKeeper helps to maintain a working root (including backing up your su binary).
Method 2: Slightly Harder
If you can’t get the update over the air, your next best bet is to flash the update from your recovery. This involves downloading the update, moving the update to your device, then booting your device to recovery and initiating the install.
1. The first step is finding the Android 4.2.2 update. You can download the Nexus 7 update here.
2. Download these to your computer, transfer them to your device in whatever manner suits you best, and reboot into recovery.
3. For those who aren’t used to it, booting to recovery is pretty simple on a Nexus: you power down the device, and then power it up while pressing (and holding) the volume up and down buttons.
You boot to a screen with a big (green) colored arrow pointing to where your power button is, and Andy the Android in the background. From here, you can use the volume up and volume down to choose different boot options. Boot to recovery by pressing volume up or down until the arrow is red and says “Recovery mode”, then pressing the power button.
Once in recovery, you’re going to want to find the option to install from a zip. This should require you to specify a zip, which is the file you saved to your device. Install the Android 4.2.2 update from that zip file, then reboot your device. The update will run its final steps before you boot to the lock screen and can enjoy the Andriod 4.2.2 goodness.
Method 3: Kinda Hard, Using ADB
This method assumes you have adb installed. This also assumes you’re updating from 4.2.1 and not an earlier build. If you’re not sure or you have adb installed, you can probably find a good set of instructions here. As always, use at your own risk. This method has also been covered before.
1. Plug the USB data cable from your computer to your device. Be sure you have the Android 4.2.2 update file for your device– again, grab the Nexus 7 update here.
2. Once the file is downloaded, move it to the same folder where ADB is located. Using the steps described above in the previous method, boot into recovery.
3. Within the recovery mode menu you should find the option to “sideload” or “apply update from adb”.
At this point, you must open a command-line window on your computer to run the adb commands. You may need to change directory to your ADB folder. These are the commands that you will run for your device:
Nexus 7:
adb sideload 6ece895ecb23.signed-nakasi-JDQ39-from-JOP40D.6ece895e.zip
After you run these commands, you’ll see a progress bar as the update loads onto the device. The progress will reach 100% and then you’ll see the device installing the update. The update will finish, at which point you can reboot the device from the recovery menu. As Android completes booting up it will run the final install processes, and then you should be at your lock screen.
Once the update completes, enjoy Android 4.2.2!
