Unable to download update from OTA-9 to OTA-11 on turbo

[Łukasz Zemczak]

DS-McGuire reported on #ubuntu-touch that he is unable to update his OTA-9 based turbo to the latest OTA-11. He gets an update notification but is unable to fully download it to proceed with the upgrade. The symptom seems to be that it reaches to ~20% and claims it cannot install.

He provided /var/log/system-image/client.log contents from which we can see multiple download-failures:

http://termbin.com/v3bx

Could this be related to networking issues in overall, or is it something broken in system-image or ubuntu-download-manager?

output of system-image-cli --info

current build number: 1
device name: turbo
channel: ubuntu-touch/stable/meizu.en
last update: 2016-06-01 14:14:09
version version: 1
version ubuntu: 20160324.1
version device: 20160323-46b6f17
version custom: 20160322-944-17-66

but the log contains
Upgrade path is 2:3

[Daniel McGuire (danielmcguire)]

Just to add that if I retry immediately the phone will give me the failure notice straight away without even trying again.

[Łukasz Zemczak (sil2100)]

Attaching tarball with all the u-d-m logs.