$ ubuntu-device-flash -v touch --password 1234 --developer-mode --wipe
WARNING --developer-mode and --password are dangerous as they remove security features from your device
2016/03/08 11:52:43 Expecting the device to expose an adb interface...
2016/03/08 11:52:43 Device is |flo|
2016/03/08 11:52:43 Flashing version 6 from ubuntu-touch/stable channel and server https://system-image.ubuntu.com to device flo
2016/03/08 11:52:44 Start pushing /home/facundo/.cache/ubuntuimages/ubuntu-touch/stable/ubuntu/flo/version-6.tar.xz to device
2016/03/08 11:52:44 Start pushing /home/facundo/.cache/ubuntuimages/pool/custom-e7bded45d0d16151d514bd048425082697ce175825afad15c0ec8c31d0d7ea98.tar.xz to device
2016/03/08 11:52:44 Start pushing /home/facundo/.cache/ubuntuimages/pool/device-2097be7062fd86891d22a509f92b899dd3635142680eeecd919edb1e817ad1a0.tar.xz to device
2016/03/08 11:52:44 Start pushing /home/facundo/.cache/ubuntuimages/gpg/image-signing.tar.xz to device
2016/03/08 11:52:44 Start pushing /home/facundo/.cache/ubuntuimages/gpg/image-master.tar.xz to device
2016/03/08 11:52:46 Start pushing /home/facundo/.cache/ubuntuimages/pool/ubuntu-5f4806a2d26af9d26279d1e66d217281dfa19219a85d2fd64999460f47d6efb9.tar.xz to device
2016/03/08 12:14:09 Done pushing /home/facundo/.cache/ubuntuimages/ubuntu-touch/stable/ubuntu/flo/version-6.tar.xz to device

(now it's 15:11)