HOW TO INSTALL MULTIPLE ROMS ON THE NEXUS 7!

Dual-booting (multiple booting) isn’t unheard of within the Android community, so far, it has been a complicated process that only the devs have been able to pull off. That’s about to change for Google’s Nexus 7 tablet, thanks to XDA Developer ‘Tasssadar’ and his new mod for the Nexus 7 called MultiROM. It not only helps boot multiple Android ROMs on your Nexus 7, you can also boot the popular Linux distro Ubuntu! More on how to install this amazing mod for the Nexus 7 after the break!

  

 

This magnificent mod works by flashing the MultiROM mod in the recovery, and then flashing the modified recovery provided by the developer in fastboot mode. After that, it’s a simple process to follow, you can multi boot any ROMs for the Nexus 7. There are no reported bugs as of yet, and the only limitation of the mod so far is not being able to boot ROMs from the USB storage at the moment. The developer has stated that he’s working on adding USB stroage boot support in future updates.

 

Even though this mod will not erase/wipe your data, it is wise to backup your important data before installing this mod on your device in case something goes wrong. Now that you’ve done that, let’s see what else you’d need install this mod.

Disclaimer: Please follow this tutorial at your own risk. TechSliver will not be responsible if your device gets damaged or bricked during the process.

Things you’ll need:

• A rooted Nexus 7 with a custom recovery installed.  Check out our Nexus 7 rooting guide.
• ADB installed on your system. Here’s a good guide on what is ADB, how to install and use it.
• MultiROMv2 zip file
• Modified recovery

How to Install MultiROM & Multiple ROMs:

1. Download the modified recoevry image zip file and copy the zip file to the root of the Nexus 7’s internal storage. Rename the recovery image to ‘recovery.img’ for convenience.
2. Boot the device into recovery and just to be safe, make a Nandroid backup using ‘backup and restore’.
3. Navigate to ‘install zip from sdcard’ > ‘choose zip from sdcard’ and select the MultiROMv2.zip, and confirm that you want to install it.
4. Once MultiROMv2.zip has flashed, reboot the device in fastboot mode and run ADB on your computer.
5. Navigate to the location of the recovery.img file and enter the following command:

   fastboot flash recovery recovery.img

6. Reboot back into the modified recovery and you will be presented with the new interface.
7. To add a ROM, navigate to Advanced > MultiROM > Add ROM, and select the ROM of your choice.
8. To install Ubuntu, use this image and install it using Step 7, selecting ‘Ubuntu’ as the ROM type instead.

 

UNINSTALLING MULTIROM

To uninstall MultiROM you can either restore the Nandroid backup made earlier on, or you can flash the boot.img file from your default ROM and a custom recovery of your liking via fastboot with the following commands in ADB:

fastboot flash boot boot.img
fastboot flash recovery recovery.img

UNINSTALLING EXISTING ROMS

If you want to erase a ROM installed on the internal storage, delete the ROM found in /sdcard/multirom.

For queries and updates about MultiBOOT, please head to the XDA-Developers’ thread.

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