Home >> News >> Nexus 7 (2012) lags fix: Restore to Android 4.4 KitKat

Nexus 7 (2012) lags fix: Restore to Android 4.4 KitKat

Google has not released an update to fix the lag issues on Nexus 7 (2012) after Android 5.0 Lollipop update and complaints from users are growing by the day. Currently, the solution is either clearing the cache and we explain restoring the tablet to Android KitKat.nexus-7-tablet

Before restoring Google Nexus 7 to factory state, the user data will need to back up the data and download the required files. The guide requires a certain level of command prompt knowledge and is aimed at Windows users. A 7-Zip software for extracting files from .tgz file, Android SDK along with the required Java SE development kit and Nexus 7 factory image can be downloaded from the links.

Download and install the above files and notice the install location (default location: C:/Users/AppData/Local/Androidandroid-sdk) known as SDK directory. Follow the steps:

1. Run SDK manager -> under Tools check “Android SDK Platform-tools” -> under extras check ” Google USB Driver” and press install #packages  -> continue with on-screen instructions.

2. The platform tools will be installed in sdk directory>platform-tools and USB drivers at extrasgoogleusb_driver.

3. Follow the YouTube link for Driver installation.

Extracting and flashing Factory image:

1. Use 7-Zip for opening the .tgz file and the.tar file inside the file -> open the directory “nakasi-jwr66y” extract the contents to sdk directory>platform-tools.

2. The extracted files should contain bootloader-grouper-4.23.img, image-nakasi-jwr66y.zip, flash-all.sh, flash-base.sh.

3. Enable fastboot mode by via adb command Code: > adb reboot-bootloader and fastboot unlock command Code: > fastboot oem unlock.

4. Use the power and volume buttons and follow the commands based on device variant, Wi-Fi(nakasi) or GSM/HSPA(nakasig)

In case the device is being sent to warranty related work relock the bootloader using Code: > fastboot oem unlock and reboot the device Code: > fastboot reboot. For a more detailed guide, users can visit here. For cache clearing method without restoring the device, click here.

About Anirudh Madhav

A movie buff, a bookworm, and a compulsive doodler. All posts by Anirudh

22 comments

  1. My Nexus 7 is useless. Lollipop has ruined my device. I want it restored.

  2. my nexus 7 completely useless. feel like throwing it away! would like to restore it but not confident enough to do it myself.

  3. After upgrading to Lollipop, I was extremely close to getting a different tablet due to the lag. This gave me the courage to get back to Kitkat as I had nothing to lose. I decided to use the WugFresh Toolkit to unlock, root, and revert back to 4.4.4. It was quite easy to accomplish, and I then installed the Franco Kernel. Now my Nexus 7 2012 is as quick or quicker than out of the box. I am back to enjoying my little tablet. The Wugfresh Toolkit make it very easy to root your device.

  4. Donald Joseph Wood

    Google needs to fix this ASAP!

  5. Donald Joseph Wood

    I couldn't follow the instructions. I don't have SDK manager so I downloaded it from the play store. There is no " Tools" option to check.

  6. All I can say is "be warned." Anyone whose instructions in restoring KitKat that refers to "nakasi" (which is Lollipop) is insufficiently inaccurate ab initio to ignore safely.

  7. IM IN THE SAME BOAT AS YOU ARE.THIS REALLY MAKES ME ANGRY.SPENDING ALL THIS MONEY FOR SOMETHING I CANT USE.THANKS SO MUCH.

  8. I'm begging you please give us a fix.

  9. I installed the 5.02 update and it improves performance A LOT. Chrome still seems a bit sluggish.

  10. My nexus 7 is now a nightmare. I wish I had not 'upgraded' to lollipop. Please fix it.

  11. Hi, Lollipop killed my Nexus 7. I persevered for a week including factory resets but it was just grinding the tablet to a halt. So I managed to reinstall Kitkat and I'm back to my happy self, except…..my tablet now merrily tells me it has a super new OS to install called Lollipop and won't give up until I install it. Anyone know how to kill off OS updates?

  12. Well I'm on 5.0.2 and my nexus 7 2012 is slow slow slow and apps keep crashing!!!!! Does anyone know how you can complain to google !!!!!!

  13. Lollipop sucks. please lets go back to kitkat without the hassle of doing a factory reset.

  14. I loved my NEXUS 7 until I downloaded Android 5 today. Now it's completely F….d

  15. I don't have the technical ability to revert to 4.4…..my Nexus 7 is absolutely rubbish now….I can't understand how this updated OS was released with so many bugs…..in a word, I am GUTTED!

  16. Same here, time to shop for another device!

  17. Fed up Nexus was great til I got lollipop Rubbish now Very upset .was a Christmas present. Ruined

  18. http://forum.xda-developers.com/showpost.php?p=45043044&postcount=15 Use this thread for a correct factory image for 4.3, the one linked here does not work!

  19. Nexus 7 is now unusable. Did a factory reset but it didn't go back to factory settings. It still has the update on it and still unusable! The instructions above are patchy at best. Without step by step instructions, including the exact files to download clearly specified, this article is useless as well.

  20. Nexus 7 is now unusable. Did a factory reset but it didn't go back to factory settings. It still has the update on it and still unusable! The instructions above are patchy at best. Without step by step instructions, including the exact files to download clearly specified, this article is useless as well.

  21. A small EASY fix that helps improve N7 2012 performance (try this and see if it helps before downgrading) is to disable auto-screen rotate. It's a bit of a pain to have to manually change the setting every time you want to rotate the screen but for some reason it hogs a lot of resources thus slowing the machine considerably. Once that option is turned off it speeds up considerably.

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