Seeing a similar symptom trying to install a large app (file manager)
from the store, the download starts fast, slows down then times out. At
the same time the browser is responsive, pings, etc.

This was on a reasonably fast 3G connection. Switching to a slightly
faster wifi connection (only 4G)  after a reboot restarted the download
where it left off but then pulled 144% of the fie and declared failure
due to a timeout, but it clearly did not timeout.

 A subsequent retry finally installed the app.

** No longer affects: ubuntu-system-image

** No longer affects: system-image (Ubuntu)

** Changed in: canonical-devices-system-image
       Status: Incomplete => Confirmed

** Changed in: canonical-devices-system-image
   Importance: Undecided => High

** Changed in: canonical-devices-system-image
     Assignee: Pat McGowan (pat-mcgowan) => Bill Filler (bfiller)

** Changed in: canonical-devices-system-image
    Milestone: None => backlog

** Description changed:

  Ubuntu Touch 15.04 (r23) [mako]
  
  Issue: Phone appears to fail to receive OTA updates. Previously, I jumped 
from (r15) to (r23) due to missing OTA updates. Currently, I see (r24) appears 
to be released on 2015 Oct 16.
  Expected behavior: System Settings > System > Updates (or System Settings > 
About this phone > Check for updates) reveals new image that I can release and 
download.
  Actual behavior: Checking for updates... > Software is up to date
  
- *Apologies for posting bug here, I cannot find correct location to file
- a bug against release/image/OTA/etc.
+ See the comment regarding similar issues for large app installs.
+ It seems if anything interrupts the transfer or if the connection is somewhat 
slow the download performance degenerates then times out.

** Changed in: ubuntu-download-manager (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1508081

Title:
  Fails to receive OTA updates

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