Install Ubuntu Touch Developer Preview
– Have a Nexus 4, Galaxy Nexus, Nexus 7 or Nexus 10 with an unlocked bootloader.
– Have Custom Recovery installed. If you don’t have it, download ClockworkMod Touch Recovery and rename it recovery.img to make the whole process easier.
– Have active USB debugging. You can do this by accessing Settings> Developer options.
– Download and have the files Armhf zip phablet.
If you already have a Custom Recovery installed, forget about the first three steps, simply restart your device in Recovery mode and go directly to the fourth step.
1.- Restart your device in bootloader mode: Since you have already installed the Android SDK on your PC to unlock the bootloader, you will now have the possibility to connect via USB debugging mode by entering this command in a terminal: »adb reboot bootloader» (without quotation marks)
2.- Install the Recovery that we have downloaded by entering the following command: »fastboot flash recovery recovery.img» (without quotes)
3.- Press any volume key and it will show Recovery Mode on the screen. Pressing the device’s on / off button (hereinafter ON button) accesses the Recovery menu.
4.- In the Recovery menu, make a backup copy in the Backup and Restore section. With this, you will save important files on your smartphone and tablet that could be relevant for a good operation later. That is why it is so important that you make the backup that, later, you will have to transfer to the computer.
5.- Restart the device in normal mode using the Recovery option for this purpose.
6.- Transfer all the files and data that you want to keep from your mobile to the PC. It is important because everything you have will be erased, and even the backup we just made, therefore, we must not forget to transfer this too. If we don’t know where it is, we can act on insurance by transferring all the files we have on the device.
7.- Transfer the compressed folder Armhf zip phablet and the specific compressed folder of your device that can be downloaded from the Requirements section, a little higher, to the root of the internal memory of the smartphone or tablet. Be careful, it should not stay in any subfolder, but in the root. Make sure that it really is the version corresponding to your device and not to another.
8.- Restart again in Recovery mode, by the common method that you commonly follow or by going back to the first steps, but without installing the Recovery, which is already installed.
9.- Make “Wipe Data / Factory Reset”. This process will allow you to reset the factory settings and the data on your device. Or what is the same, it will erase absolutely everything you have. Therefore, it is essential that you have previously made a backup of everything important on your device and transferred it to your computer.
10.- Make «Wipe Cache». This step will erase all the cached data that may be stored and that would only report problems when installing a different version of the operating system.
11.- Make “Wipe Dalvik Cache” from the Advanced menu. This step does the same as the previous one but in reference to the machine that runs applications and other Java processes.
12.- Select “install zip from sdcard” and then “choose zip from sdcard”. Then choose the Phablet armhf zip folder.
13.- Do exactly the same with the compressed folder that corresponds to your device.
14.- Now restart the system with «reboot system now».
When starting, you will already have Ubuntu Touch on your device. If you have a different Recovery menu, you will have to carry out the actions corresponding to the previous ones. Actually, it is not too complicated. Tomorrow we will tell you how to return to Android once you have tired of Ubuntu or when you want to resort to the previous possibilities.
He process that we indicate here may not be entirely safe, so we warn you that if you carry it out it is under your responsibility and assuming the possible consequences. Although most likely you have already installed other Custom ROMs before.