Long story short:
I want to install UBports Ubuntu Touch on my bq Aquaris E5 HD Ubuntu Edition using the UBports Installer. Due to this and comparable issues I fell back to installer version 0.1.21-beta. The installer runs fine but once the files need to be flashed to the device it says that it needs to be OEM unlocked. I thought it wasn't necessary to do an OEM unlock on devices running the Canonical Ubuntu Touch, or am I wrong? Is this an issue with the (old) installer? As I could not find any information on this, I appreciate your help.
Long story long:
I own a bq Aquaris E5 HD Ubuntu Edition running the latest Canonical Ubuntu Touch (Ubuntu 15.04 OTA-15) and finally found the time to switch to UBports Ubuntu Touch. To do so, I'm running the AppImage version of the installer under Manjaro (Arch Linux). The release version 0.2.3-Beta doesn't work properly for me and fails with the same symptoms as described here, in short: There is no button to start the installation.
In this blog post it works with version 0.1.21-Beta with a bq Aquaris E4.5, so I tried it. This version runs fine, but after the download and switching my phone to bootloader / fastboot mode the installer says that the device needs to be OEM unlocked. I could not find any information on this except that it is necessary to enable the OEM unlock in developer mode on Android devices. I'm unsure whether this is a bug in the installer, something that always occurs when switching Canonical Ubuntu Touch devices to UBports Ubuntu Touch or a special case for my device. The last point came to my mind because I sent my phone to bq to let them "repair" it after I broke the display. In fact they sent back a completely new device. I don't know if that my have something to do with this issue.
Thanks for your help in advance!