Note that upstream's website
https://live.gnome.org/NetworkManager/MobileBroadband
says
Huawei E220 (firmware versions older than 11.117.09.04.00 (Vodafone
only) are known to be problematic; make sure you have 11.117.10.00.00 or
later)
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https://bugs.launchpad.net/bugs/528916
Title:
Connecting to Internet through HSDP USB modem freezes mouse movement
-- Huawei E220
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