Update Nexus 7 2012 (3G) To Android 5.1.1 Lollipop With CM12.1 (Nightly)

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Android 5.1.1 Lollipop based custom ROM CM12.1 is now available for Nexus 7 2012 (3G). You can download and install CM12.1 custom ROM on your Nexus 7 2012 (3G) if your device already have supported custom recovery installed such as latest version of CWM recovery or TWRP recovery. Nexus 7 2012 (3G) comes with good hardware spec that makes it capable enough to run Android 5.1.1 Lollipop smoothly. To learn how to install Android 5.1.1 Lollipop based CM12.1 custom ROM on Nexus 7 2012 (3G) continue reading this article.

Few cool Android 5.1.1 Lollipop features are – Quick Settings panel, HD voice calling, native dual-SIM support, Revamped Screen Pinning, improved Device protection that stopping thieves from factory resetting your phone, improved Volume and Interruptions sliders and many more.

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Warning!

This tutorial is only for Nexus 7 2012 (3G). Don’t try this guide on any other Android device. Also, we (PrimeHowTo) are not responsible for any damage caused due to the instruction given in this page. Try this at your own risk. However, it is very unlikely that your device will be damaged if you follow all the instructions as it is which are mentioned in procedure.

Pre Requisites:

1. It’s advisable to backup your data prior flashing. I recommend app Helium for this purpose, however you can use any other preferred backup app. [General Guide]

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2. Make sure your device have enough battery power (at least 50% battery power) to avoid any accidental brick. You can install an app like Battery Notifier BT Free on your Android device to check it easily.

3. You must have USB Driver Installed for Nexus 7 2012 (3G) in your PC. If you manage to access your phone data after connecting to your computer then you already have USB driver installed. [Download Driver Manually]

4. Make sure USB Debugging is enabled otherwise it’s won’t be possible to transfer file between PC and Nexus 7 2012 (3G). By default its enabled, so you don’t have to worry. [General Guide]

5. Your device must have latest available custom recovery installed. [General Guide]

Hope, you already checked all pre-requisites. It’s time to follow the step-by-step guide on how to install Android 5.1.1 Lollipop based CM12.1 (nightly) ROM on Nexus 7 2012 (3G).

File Required(Download by clicking on it)

  1. CM12.1 (nightly) For Nexus 7 2012 (3G) [Filename: cm-12.1-20150528-NIGHTLY-tilapia.zip]
  2. Google Apps [Filename: gapps-510-base-20150327-1-signed.zip]

How to Install Android 5.1.1 Lollipop based CM12.1 (nightly) ROM on Nexus 7 2012 (3G)

  1. Transfer downloaded file to your Android device by connecting to PC. Make sure you copied all files on SD Card (avoid coping within folder). Important: Don’t extract any files.
  2. Disconnect your device from computer and then turn off your Nexus 7 2012 (3G).
  3. Boot into recovery mode. Press and hold Volume Down + Power key together and release the Power key once the Google logo appears, but keep holding the Volume Down key. You will be in Bootloader mode now. Press Volume Down two times so that Recovery option appears, and then press Power key to reboot into recovery mode. Use Volume keys to browse between options in recovery while Power key to select an option.
    1. You can also try: How To Boot Into Recovery Without Key Combination
  4. First of all create an image of your existing OS by performing Nandroid backup of your existing ROM which you can restore later if this new ROM don’t perform the way you want or if there any glitch. To do so, select Backup and Restore, then on the next screen, select Backup again. Go back to main recovery menu after backup is complete.
  5. Now, perform data wiping task. To perform this, select wipe data/factory reset, then select Yes on next screen to confirm your action. Wait few minutes till the data wipe is complete. Now come back to CWM recovery main menu. Select wipe cache partition and after wiping process done, select Wipe Dalvik Cache under advance option to perform Dalvik cache wiping. Perform this step 3 times to avoid any bootloop issue.
  6. Select install zip from sdcard, then select choose zip from sdcard. Now, locate the CM12.1 (nightly) Zip file that you copied earlier in Step 1 and select it by pressing Power button. Confirm installation by selecting Yes – Install _____.zip on the next screen. The ROM installation will begin.
  7. Once the ROM installation process end, repeat the Step 6 but choose the gapps-510-base-20150327-1-signed.zip file instead of ROM zip to install the Google apps package.
  8. When installation is completed, perform the Step 4 one more time and then go back to the main recovery menu and select reboot system now to reboot your Nexus 7 2012 (3G) and boot into Android 5.1.1 Lollipop ROM CM12.1 (nightly).
  9. Returning to Previous ROM: To go back to your previous ROM, boot into recovery, select backup and restore then restore your previous ROM by selecting it from the list.

Tutorial For TWRP Recovery Users:

  1. Transfer downloaded file to your Android device by connecting to PC. Make sure you copied all files on SD Card (avoid coping within folder). Important: Don’t extract any files.
  2. Disconnect your device from computer and then turn off your Nexus 7 2012 (3G).
  3. Boot into recovery mode. Press and hold Volume Down + Power key together and release the Power key once the Google logo appears, but keep holding the Volume Down key. You will be in Bootloader mode now. Press Volume Down two times so that Recovery option appears, and then press Power key to reboot into recovery mode.
    1. You can also try: How To Boot Into Recovery Without Key Combination
  4. Create a Backup using TWRP Backup Option.
  5. Perform a Factory Reset (this will delete all apps and their settings and game progress). To do this, Tap on Wipe, then at the bottom of the screen do a Swipe on the ‘Swipe to factory reset‘ option.
  6. Now add zip file for flashing. to do so, tap on Install, then browse to the location where you saved the files and tap on the CM12.1 (nightly) Zip file. Then tap on Add More Zips, and add gapps-510-base-20150327-1-signed.zip. Now at the bottom of the screen, do a swipe on the Swipe to confirm flash option to begin flashing.
  7. When installation is completed, go back to the main recovery menu and tap on Reboot and then, tap on System to reboot your Nexus 7 2012 (3G) and boot into Android 5.1.1 Lollipop ROM CM12.1 (nightly).
  8. Returning to Previous ROM: To go back to your previous ROM, boot into recovery, select Backup then through Restore option, restore your previous ROM by selecting it from the list.

That’s it! You just learned how to update your Nexus 7 2012 (3G) to Android 5.1.1 Lollipop custom firmware using CM12.1 (nightly). Explore the latest Android 5.1.1 Lollipop based CM12.1 (nightly) ROM.

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