Isso!
Execute agora o comando abaixo, pra gente confirmar a mudança do modem.
sudo eject sr0
dmesg | tail
falstaff@ubuntu:~$ sudo su
[sudo] password for falstaff:
root@ubuntu:/home/falstaff# sudo eject sr0
root@ubuntu:/home/falstaff# dmesg | tail
[ 1136.241413] wlan0: direct probe to AP 00:25:86:c6:7f:a0 (try 1)
[ 1136.244480] wlan0: direct probe responded
[ 1136.244485] wlan0: authenticate with AP 00:25:86:c6:7f:a0 (try 1)
[ 1136.247534] wlan0: authenticated
[ 1136.247553] wlan0: associate with AP 00:25:86:c6:7f:a0 (try 1)
[ 1136.444055] wlan0: associate with AP 00:25:86:c6:7f:a0 (try 2)
[ 1136.448662] wlan0: RX AssocResp from 00:25:86:c6:7f:a0 (capab=0x431 status=0 aid=3)
[ 1136.448667] wlan0: associated
[ 1136.449112] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 1147.280053] wlan0: no IPv6 routers present
root@ubuntu:/home/falstaff#
root@ubuntu:/home/falstaff# dmesg |tail
[ 1136.241413] wlan0: direct probe to AP 00:25:86:c6:7f:a0 (try 1)
[ 1136.244480] wlan0: direct probe responded
[ 1136.244485] wlan0: authenticate with AP 00:25:86:c6:7f:a0 (try 1)
[ 1136.247534] wlan0: authenticated
[ 1136.247553] wlan0: associate with AP 00:25:86:c6:7f:a0 (try 1)
[ 1136.444055] wlan0: associate with AP 00:25:86:c6:7f:a0 (try 2)
[ 1136.448662] wlan0: RX AssocResp from 00:25:86:c6:7f:a0 (capab=0x431 status=0 aid=3)
[ 1136.448667] wlan0: associated
[ 1136.449112] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 1147.280053] wlan0: no IPv6 routers present
root@ubuntu:/home/falstaff#