Comment 2 for bug 407519

Successful attempt (another phone):

syslog:
Jul 31 07:01:49 vampirella-netbook NetworkManager: <info> Activation (ttyACM0) Stage 2 of 5 (Device Configure) complete.
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so loaded.
Jul 31 07:01:49 vampirella-netbook pppd[22686]: pppd 2.4.5 started by root, uid 0
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Removed stale lock on ttyACM0 (pid 22253)
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Using interface ppp0
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Connect: ppp0 <--> /dev/ttyACM0
Jul 31 07:01:52 vampirella-netbook NetworkManager: <info> (ttyACM0): device state change: 5 -> 6
Jul 31 07:01:52 vampirella-netbook pppd[22686]: PAP authentication succeeded
Jul 31 07:01:52 vampirella-netbook NetworkManager: <info> (ttyACM0): device state change: 6 -> 7
Jul 31 07:01:53 vampirella-netbook pppd[22686]: Cannot determine ethernet address for proxy ARP
Jul 31 07:01:53 vampirella-netbook pppd[22686]: local IP address 90.143.253.208
Jul 31 07:01:53 vampirella-netbook pppd[22686]: remote IP address 10.6.6.6
Jul 31 07:01:53 vampirella-netbook pppd[22686]: primary DNS address 130.244.127.161
Jul 31 07:01:53 vampirella-netbook pppd[22686]: secondary DNS address 130.244.127.169
Jul 31 07:01:53 vampirella-netbook NetworkManager: <info> PPP manager(IP Config Get) reply received.
Jul 31 07:01:53 vampirella-netbook NetworkManager: <info> Activation (ttyACM0) Stage 4 of 5 (IP Configure Get) scheduled...
Jul 31 07:01:53 vampirella-netbook NetworkManager: <info> Activation (ttyACM0) Stage 4 of 5 (IP Configure Get) started...
Jul 31 07:01:53 vampirella-netbook NetworkManager: <info> Activation (ttyACM0) Stage 5 of 5 (IP Configure Commit) scheduled...
Jul 31 07:01:53 vampirella-netbook NetworkManager: <info> Activation (ttyACM0) Stage 4 of 5 (IP Configure Get) complete.

messages:
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so loaded.
Jul 31 07:01:49 vampirella-netbook pppd[22686]: pppd 2.4.5 started by root, uid 0
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Removed stale lock on ttyACM0 (pid 22253)
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Using interface ppp0
Jul 31 07:01:49 vampirella-netbook pppd[22686]: Connect: ppp0 <--> /dev/ttyACM0
Jul 31 07:01:52 vampirella-netbook pppd[22686]: PAP authentication succeeded
Jul 31 07:01:53 vampirella-netbook pppd[22686]: local IP address 90.143.253.208
Jul 31 07:01:53 vampirella-netbook pppd[22686]: remote IP address 10.6.6.6
Jul 31 07:01:53 vampirella-netbook pppd[22686]: primary DNS address 130.244.127.161
Jul 31 07:01:53 vampirella-netbook pppd[22686]: secondary DNS address 130.244.127.169
Jul 31 07:02:35 vampirella-netbook pppd[22686]: Terminating on signal 15
Jul 31 07:02:35 vampirella-netbook pppd[22686]: Connect time 0.7 minutes.
Jul 31 07:02:35 vampirella-netbook pppd[22686]: Sent 420 bytes, received 420 bytes.
Jul 31 07:02:35 vampirella-netbook pppd[22686]: Connection terminated.