I've flashed "Stable" if you could call it that. Good news is my Ting Data is working perfectly, bad news is that a lot of apps keep crashing. "Stable" is nowhere near as "Stable" as rc_proposed. I'll still have fun with it while waiting for an update. Thanks again for the help.

I haven't found a solution yet. Interestingly the Bluetooth started working last night so that is an improvement. I will try "stable" and see if I can get data. Thanks for the advice.

I'm up and running on the Nexus 5 but my Ting Data isn't working. It's connected to Ting for calls and it says 4G but it's not pulling data. Any suggestions would be appreciated. I'm on devel_rc-proposed

I switched from my Ubuntu 16.04.2 desktop to my Ubuntu Gnome 16.10 laptop and tried again. This time I got:

sudo ubuntu-device-flash --server=http://system-image.ubports.com touch --channel=ubuntu-touch/devel_rc-proposed --device=hammerhead --bootstrap
[sudo] password for Blank:
WARNING You are about to flash your phone with a development image - continue at your own risk! There is absolutely no guarantee that even the most basic phone functions will work.
2017/02/19 19:10:45 Device is |hammerhead|
2017/02/19 19:10:46 Flashing version 264 from ubuntu-touch/devel_rc-proposed channel and server http://system-image.ubports.com to device hammerhead
2017/02/19 19:10:58 Waiting for device to enter recovery mode ...
2017/02/19 19:11:29 Start pushing /home/che/.cache/ubuntuimages/gpg/image-signing.tar.xz to device
2017/02/19 19:11:29 Start pushing /home/che/.cache/ubuntuimages/pool/keyring-f812366ff5018823acd3918f65837f7ade9679431e6e5ca6627a4e48f8dd643b.tar.xz to device
2017/02/19 19:11:29 Start pushing /home/che/.cache/ubuntuimages/ubuntu-touch/devel_rc-proposed/hammerhead/version-264.tar.xz to device
2017/02/19 19:11:29 Start pushing /home/che/.cache/ubuntuimages/pool/device-db15e34acb7ace860a9c3e1d6f65e88cde0afbdc6c7aa0635217591298b21685.tar.xz to device
2017/02/19 19:11:29 Start pushing /home/che/.cache/ubuntuimages/pool/ubuntu-253b179088cd6c539e33bd426ae3d529997b5985cd5963e5b67def3477a72451.tar.xz to device
2017/02/19 19:11:29 Start pushing /home/che/.cache/ubuntuimages/gpg/image-master.tar.xz to device
2017/02/19 19:11:29 Done pushing /home/che/.cache/ubuntuimages/gpg/image-signing.tar.xz to device
2017/02/19 19:11:29 Done pushing /home/che/.cache/ubuntuimages/pool/keyring-f812366ff5018823acd3918f65837f7ade9679431e6e5ca6627a4e48f8dd643b.tar.xz to device
2017/02/19 19:11:29 Done pushing /home/che/.cache/ubuntuimages/ubuntu-touch/devel_rc-proposed/hammerhead/version-264.tar.xz to device
2017/02/19 19:11:29 Done pushing /home/che/.cache/ubuntuimages/gpg/image-master.tar.xz to device
2017/02/19 19:11:50 Done pushing /home/che/.cache/ubuntuimages/pool/device-db15e34acb7ace860a9c3e1d6f65e88cde0afbdc6c7aa0635217591298b21685.tar.xz to device
2017/02/19 19:12:38 Done pushing /home/che/.cache/ubuntuimages/pool/ubuntu-253b179088cd6c539e33bd426ae3d529997b5985cd5963e5b67def3477a72451.tar.xz to device
2017/02/19 19:12:38 Created ubuntu_command: /home/che/.cache/ubuntuimages/ubuntu_commands324049987
2017/02/19 19:12:38 Rebooting into recovery to flash
Failed to enter Recovery

I tried again about 6 times and it eventually worked. The problem for me was that the phone kept freezing on the Google logo when it rebooted to flash UT. Try it a few times and see if it works for you, it seems to be random. I am now up and running with Ubuntu Touch on my N5.

I'm having a similar issue on the Nexus 5 when I try the flash UT I get this:

sudo ubuntu-device-flash --server=http://system-image.ubports.com touch --channel=ubuntu-touch/devel_rc-proposed --device=hammerhead --bootstrap
WARNING You are about to flash your phone with a development image - continue at your own risk! There is absolutely no guarantee that even the most basic phone functions will work.
2017/02/19 17:51:25 Device is |hammerhead|
2017/02/19 17:51:26 Flashing version 264 from ubuntu-touch/devel_rc-proposed channel and server http://system-image.ubports.com to device hammerhead
can't flash recovery image