Well :) I bought a second hand Nexus 4, because I want to test uNav in it.
I never flashed an Ubuntu Phone, then, I'll put step by step :P Any doubts, please ask in comments.
I followed this official guide, but I didn't backup Android.
Step 1. Install in Ubuntu Desktop the software for flashing phone:
sudo add-apt-repository ppa:ubuntu-sdk-team/ppa sudo apt-get update sudo apt-get install ubuntu-device-flash sudo apt-get install phablet-tools
Step 2. Enable adb to see the device:
Connect Nexus by USB, turn it on
Settings > About Phone
About Phone > Build number > Tap 7 times to become developer
Settings > Developer Options > USB Debugging
Click to enable USB Debugging mode
Acept popup (remember checkbox)
costales@dev:~$ adb devices List of devices attached 0065f7f61916b80b device costales@dev:~$
Step 3. Reboot in recovery mode:
costales@dev:~$ adb reboot bootloader costales@dev:~$
Step 4. You'll see your device here:
Remember “PRODUCT NAME - mako” that mako ;)
Step 5. Check phone is visible yet:
costales@dev:~$ fastboot devices 0065f7f61916b80b fastboot costales@dev:~$
Step 6. Unlock OEM lock:costales@dev:~$ sudo fastboot oem unlock [sudo] password for costales: ... OKAY [ 14.160s] finished. total time: 14.160s costales@dev:~$
Step 7. Accept OEM unlock:
Volume up > Accept with Power button: LOCK STATE will be unlocked, in red
Step 8. Reboot.costales@dev:~$ fastboot reboot rebooting... finished. total time: 0.001s costales@dev:~$
Phone will reboot in Android, this will take a while. When it will boot, skip everything Android will ask. Poweroff the phone.
Step 9. Choose your Ubuntu Phone channel:
Take a look to what version of Ubuntu Phone you want (stable, rc-proposed…):
https://developer.ubuntu.com/en/start/ubuntu-for-devices/image-channels/
Step 10. Reboot in Recovery mode:
Reboot in recovery mode: Power off + Volume Down
Step 11: Install Ubuntu Phone with your desired channel:
I'll choose the rc-proposed (I want to try next things :D):ubuntu-device-flash touch --channel=ubuntu-touch/rc-proposed/ubuntu --bootstrap
Install in recovery boot
It'll take a while:
costales@dev:~$ ubuntu-device-flash touch --channel=ubuntu-touch/rc-proposed/ubuntu --bootstrap 2016/02/08 19:58:01 Expecting the device to be in the bootloader... waiting 2016/02/08 19:58:01 Device is |mako| 2016/02/08 19:58:02 Flashing version 361 from ubuntu-touch/rc-proposed/ubuntu channel and server https://system-image.ubuntu.com to device mako 10.61 MB / 273.55 MB [=>________________________________________________________________] 3.88 % 85.43 KB/s 52m31s
Step 12. Wait the Ubuntu menu
A menu with Ubuntu logo will appear, don't touch anything, the phone will restart by itself ;)
Wait, don't choose anything
All is done :)) Enjoy the freedom, enjoy your Ubuntu Phone!
Yes!!! :D
EXTRAS:
Convergence:
Do you want connect the Nexus to a Monitor and have an Ubuntu Desktop? Follow this guide :)
Picture of Marius Quabeck
Run desktop apps:
Do you want to run Desktop apps in your Ubuntu Phone? Follow this guide :))
Thanks to Marius & Gonzalo for their help!