...
usb-storage: device scan complete
usb 1-5: USB disconnect, address 3
usb 1-5: new high speed USB device using ehci_hcd and address 4
usb 1-5: configuration #1 chosen from 2 choices
drivers/usb/class/cdc-acm.c: This device cannot do calls on its own. It is no modem.
cdc_acm 1-5:1.6: ttyACM0: USB ACM device
usbcore: registered new driver cdc_acm
drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters
usb0: register 'cdc_ether' at usb-0000:00:1d.7-5, CDC Ethernet Device, 32:9e:46:5a:de:33
usbcore: registered new driver cdc_ether

[Dialer Defaults]
Modem = /dev/ttyACM0
Baud = 460800
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = USB Modem
Phone = *99#
Username = t-mobile
Password = tm

# cat /etc/ppp/peers/wvdial
noauth
name wvdial
usepeerdns

--> WvDial: Internet dialer version 1.54.0
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
~[7f]}#@!}!} } }2}#}$@#}!}$}%\}"}&} }*} } g}%~
--> Carrier detected. Waiting for prompt.
~[7f]}#@!}!} } }2}#}$@#}!}$}%\}"}&} }*} } g}%~
--> PPP negotiation detected.
--> Starting pppd at Sun Dec 13 23:44:29 2009
--> pid of pppd: 6145
--> Using interface ppp0
--> Authentication (PAP) started
--> Authentication (PAP) successful
--> local IP address xx.xxx.xxx.xxx
--> remote IP address 10.6.6.6 [<- oo-er!]
--> primary DNS address 149.254.192.126
--> secondary DNS address 149.254.201.126

(... at this point, after checking a couple of pages loaded ok, I hit ctrl-C)

Caught signal #2! Attempting to exit gracefully...
--> Terminating on signal 15
--> Connect time 1.5 minutes.
--> Terminate Request (Message: "User request" )
--> Disconnecting at Sun Dec 13 23:45:56 2009