Core Code

Here I’ll show the step by step in ‘How to get away with android’ and play with an amazing thing called SailfishOS :).

Notice: These steps are explained for only Nexus 7, but it’s important to know that for other hardware you just need the correct software which support it.

Step 1: Downloads and settings

Please download every software and save it in a folder

1. https://dl.twrp.me/grouper/twrp-2.8.7.0-grouper.img . Don’t be afraid, this will provide you with tools for install requested images into your device (Nexus  7).
2. Install these tools: android-tools-adb android-tools-fastboot . I’m using a Debian/Ubuntu distro, for it was: sudo apt-get install android-tools-adb android-tools-fastboot.
3. Get cynogemod image compatible with Nexus 7. https://download.cyanogenmod.org/get/jenkins/42501/cm-10.1.3-grouper.zip
4. Get Sailfish grouper image: http://jolla.toimii.fi/sailfishos/?file=sailfishos-grouper-release-1.0.8.19-alpha1.zip

Step 2: Hands on, adventure time!

Once you have all tools downloaded it’s time to start the adventure and setting images and do the magic.

1. With your device (Nexus 7) connect through USB cable in your PC. Run
   1. Enable USB debugging option: settings->developer options->USB debugging. See image bellow (I took from another device, but this option it always in the same place)
2. Now run:
   1. adb devices (it’ll show the number of your device, if everything was right it’ll be there if not, plug your USB cable again and run adb devices.
   2. If ^ previous step was ok, now run: adb reboot bootloader
   3. fastboot devices: it’ll show an output similar to adb devices
   4. fastboot oem unlock: it’ll unlock your device bootloader
   5. fastboot flash recovery twrp-2.8.7.0-grouper.img : will flash the recovery image for future uses.
   6. Reboot and get into in recovery mode. To do this in Nexus 7 we need to hold/press power button and volume down button at the same time.
   7. Select recovery mode in the bootloader screen
      1. First image is the bootloader menu, in order to select recovery mode, image 2, press volume buttons up or down. Once in recovery mode menu press power button to get into in it. Third image shows TWRP recovery image in action.
         
         

         

         
   8. Once in recovery mode use adb push to copy cynogenmod and sailfish image to /sdcard/. Before execute the commands bellow, run a: adb devices to see if your device is there.
      1. adb push cm-10.1.3-grouper.zip
      2. adb push sailfishos-grouper-release-1.0.8.19-alpha1.zip
   9. It’s strongly recommend that you backup everything in your device if you follow with these steps.
   10.  If everything goes right you will see something like that in Install menu
   11. Ignore the trash I have at my device and pay atetion only in the entries about the images we pushed up. cm-10.1.3-grouper.zip and sailfishos-grouper-release-1.0.8.19-alpha1.zip
   12. Select cm-grouper image and install it.
   13. Select sailfishos image and install it
   14. If everything was ok, just reboot your device and enjoy sailfishos 🙂

[UPDATED]

References:

[1] https://neklaf.wordpress.com/2016/08/11/installing-cyanogenmod-12-1-on-nexus-7-2012-version-a-k-a-grouper/

[2] https://wiki.merproject.org/wiki/Adaptations/libhybris/Install_SailfishOS_for_grouper

[3] https://drive.google.com/open?id=0B8SJVs6mZyogOFBSUmloOFdiVkU

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