Comment 23 for bug 1042456

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Aleksander Morgado (aleksander-m) wrote :

Current MM in Ubuntu fully ignores WWAN ports handled using the QMI protocol; which means the modem is stuck to use PPP over a serial port. That method seems to be enough for slower connections like GSM/HSPA, but definitely not for LTE.

The fix for this is to use QMI and the WWAN port, as done in current git master of MM :-/