If the modem is properly connecting to the ISP there is nothing more to be done with the wvdial.conf files, no matter where they are or how many. That's all wvdial does.
Let's try a couple of things:
Dial & connect, then typeinto a terminal. This will let us see all the network connections and their metric (priority).
Also type
Code:
tail -25 /var/log/messages
into a terminal. This will let us see what the computer has to say at the moment of connection. Specifically we're looking for a "connect" line something like the third line here:
Code:
Sep 28 09:50:47 asimov pppd[4364]: pppd 2.4.4 started by fred, uid 1500
Sep 28 09:50:47 asimov pppd[4364]: Using interface ppp0
Sep 28 09:50:47 asimov pppd[4364]: Connect: ppp0 <--> /dev/ttyACM0
Sep 28 09:50:48 asimov pppd[4364]: PAP authentication succeeded
Sep 28 09:50:48 asimov pppd[4364]: local IP address xx.xx.xx.xx
Sep 28 09:50:48 asimov pppd[4364]: remote IP address xx.xx.xx.xx
And, just as a double check, ensure that Firefox is not set up to use a proxy.
firefox > edit > preferences > advanced > connection settings
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