I can't see any usb-modeswitch problem but your ZTE dongle does
repeatedly fall off the usb bus and moment later arriving again with its
initial id 19d2:1595 which usb_modeswitch immediately switches to
19d2:1592. This sequence is repeated through the whole log session:

09:49:38  19d2:1595
09:49:41 modeswitch
09:50:17  19d2:1592

09:51:07 19d2:1595
09:51:07 modeswitch
09:51:08 19d2:1592

09:51:56 19d2:1595
09:51:57 modeswitch
09:51:57 19d2:1592

09:52:51 19d2:1595
09:52:52 modeswitch
09:52:53 19d2:1592

The most likely reason for a device to fall off the usb bus is that it
draws more current than what the usb port can deliver. A faulty usb
controller or abad usb cable can also cause this problem but power
problem is the most likely.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to usb-modeswitch in Ubuntu.
https://bugs.launchpad.net/bugs/1903331

Title:
  usb-modeswitch 2.6.1-1ubuntu2 is very buggy on Ubuntu 20.10

Status in usb-modeswitch package in Ubuntu:
  Incomplete

Bug description:
  Hi,
  I recently allowed groovy-proposed package install of usb-modeswitch 
2.6.1-1ubuntu2, because the default one which came with the system was useless.

  * What you expected to happen:

  My USB drive should be detected as mobile broadband connection faster
  as possible without any unpleasant inconvenience after boot stage.

  *  What happened instead:

  It takes up to 15-25 mins to my USB Drive be recognized as USB mass and be 
truly ready for mobile broadband connection. Until then, any tries to connect 
to internet even if it appears to be ready on system menu or network settings - 
mobile broadband - results in failure. When I try to connect in that period, 
the USB mass is ejected and prepared for ready mode automatically after few 
secs beyond every time.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 20.10
  InstallationDate: Installed on 2020-11-05 (1 days ago)
  InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  Package: usb-modeswitch 2.6.1-1ubuntu2 [origin: unknown]
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 5.8.0-26.27-generic 5.8.14
  Tags: groovy third-party-packages
  Uname: Linux 5.8.0-26-generic x86_64
  UnreportableReason: This does not seem to be an official Ubuntu package. 
Please retry after updating the indexes of available packages, if that does not 
work then remove related third party packages and try again.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/1903331/+subscriptions

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