Hi Marc,

Actually, I only forgot it when writing the post. In reality I tried both but the one without bootstrap goes nowhere since it appears to require adb which is not available in bootloader mode..

FYI I'm new to ubuntu touch and android tools although I am a developer...

So I went about trying to flash my Fairphone 2 (latest 1.5.1 update) with Ubuntu Touch. I'm on ubuntu 16.04 and I first tried installing tools as specified in the official Ubuntu docs: https://developer.ubuntu.com/en/phone/devices/installing-ubuntu-for-devices/

It seems that adb and fastboot from the ubuntu-sdk-team/ppa is not up to date however since I adb and fastboot would not work with this version. Thus I downloaded the android SDK and got adb and fastboot to work. To get the ubuntu-device-flash to pickup the proper adb/fastboot binaries I moved repo-sourced binaries and symlinked the binaries from android SDK to /usr/bin/<adb|fastboot>

Finally thinking I was good to go I ran (as root):
ubuntu-device-flash --server=http://system-image.ubports.com touch --channel=ubuntu-touch/stable --device=FP2 --bootstrap

Having already downloaded the files with previous runs it seemed to start working outputting:
2016/07/26 17:34:27 Device is |FP2|
2016/07/26 17:34:28 Flashing version 8 from ubuntu-touch/stable channel and server http://system-image.ubports.com to device FP2

Until I got: "Failed to enter Recovery"

It appears that nothing happened at all... I was afraid I had bricked the phone but it just boots back into Android as usual after reboot.

Any ideas on how to move forward?