•Your tablet should have ClockworkMod recovery installed.
• Please make sure you have this recovery!Make a Nandroid backup of your
previous phone set up before proceeding – for just in case anything
•This tutorial will wipe out all your existing data. Proceed at your own risk.
How to Install OctOS Android 6.0 Marshmallow Custom ROM on ASUS Nexus 7
Step 1 – Download OctOS Android 6.0 ROM and Google Apps for Nexus 7 to your computer.
Step 2 – Connect and mount your Nexus 7 USB memory on your computer using the USB cable.
Step 3 – Now copy/paste the downloaded Android 6.0 ROM zip and Google
Apps zip files to your SD card. Make sure the files are in the SD card
root (not in any folder).
Step 4 – Then turn OFF your tablet and disconnect from the USB cable.
Step 5 – Now to get in the Bootloader Mode. Turn ON the tablet while
pressing and holding the Volume Up + Volume Down and Power buttons.
Step 6 – Follow the navigation instructions on the screen. Select BOOTLOADER and then go to RECOVERY.
Step 7 – Once you are in ClockworkMod Recovery, select perform a full
data wipe by selecting “wipe data/factory reset” . Use the Power button
to select everything while in the Recovery Mode.
Step 8 – Then, perform a cache wipe by selecting “wipe cache partition” .
Step 9 – Now this is optional, but it is recommended to perform a wipe
of your dalvik cache as well. You will not get into boot loops or any
other errors. From CWM recovery, go to ‘advanced’ and then select “wipe
Step 10 – Then go back to the main recovery screen and select “install zip from SD card”.
Step 11 – Now select “choose zip from sdcard”. Using your volume keys,
navigate to the Android 6.0 ROM zip file that you copied to your SD card
and select it using the Power button. Confirm the installation on the
next screen and the installation procedure should start now.
Google Apps: Repeat the above step for the Gapps.zip file as well and install it on your tablet.
Step 12 – After the installation completes, go to “+++++Go Back+++++”
and reboot the tablet by selecting “reboot system now” from the recovery
Your Nexus 7 will boot now and it might take about 5 minutes to boot on your first time. So, please wait.