E3372 ussd, sim menu, etc

Hardware Questions and Recommendations
4

Ok, first update. Reflashed to stick, configured as here:

config interface 'wan'
         option ifname 'wwan0'
         option proto 'ncm'
         option device '/dev/cdc-wdm0'
         option mode 'auto'
         option apn 'the_text_name_of_your_mobile_network'
         option ipv6 'auto'
         option metric '100'

got the same misbehavior as in linked post

daemon.notice netifd: wan (6693): Timeout running AT-command
daemon.notice netifd: wan (6693): Failed to set operating mode
daemon.notice netifd: wan (7490): Stopping network wan
daemon.notice netifd: wan (7490): sending ->
daemon.notice netifd: Interface 'wan' is now down
daemon.notice netifd: Interface 'wan' is setting up now
daemon.notice netifd: wan (7499): Configuring modem
daemon.notice netifd: wan (7499): WARNING: Variable 'modes' does not exist or is not an array/object
daemon.notice netifd: wan (7499): Setting mode
daemon.notice netifd: wan (7499): sending ->

Solution was to change the device to /dev/ttyUSB0 like this:

config interface 'wan'
         option ifname 'wwan0'
         option proto 'ncm'
         #option device '/dev/cdc-wdm0'
         option device '/dev/ttyUSB0'
         option mode 'auto'
         option apn 'the_text_name_of_your_mobile_network'
         option ipv6 'auto'
         option metric '100'

and do the following to activate changes

/etc/init.d/network restart

#and possibly these if still not working
ip link set wwan0 down
ip link set wwan0 up
ifdown wan
ifup wan

I think in the linked post that's what the author did too, it just wasn't very explicit.

Anyhow, now on to the sms, ussd.