'usb_modeswitch' equivalent

[Saifi Khan <saifi.khan%fastpath.in@localhost>]

Hi:

What is the 'usb_modeswitch' equivalent in NetBSD-current ?

Environment
-----------
Running NetBSD-current 2013-02-20 snapshot on AMD64 with 
RADEON HD 6290.

Issue
-----
On attaching HUAWEI E171 USB 3G MODEM with vendor Id 12d1 
and product Id 1506 (configures absolutely fine on gentoo 
linux using usb_modeswitch) the following lines are seen in 
the dmesg log:

ehci1: handing over full speed device on port 1 to ohci1
umass1 at uhub3 port 1 configuration 1 interface 0
umass1: HUAWEI HUAWEI Mobile, rev 2.00/1.02, addr 2
umass1: using SCSI over Bulk-Only
scsibus1 at umass1: 2 targets, 1 lun per target
umass2 at uhub3 port 1 configuration 1 interface 1
cd1 at scsibus1 target 0 lun 0: <HUAWEI, Mass Storage, 2.31> cdrom removable
umass2: HUAWEI HUAWEI Mobile, rev 2.00/1.02, addr 2
umass2: using SCSI over Bulk-Only
scsibus2 at umass2: 2 targets, 1 lun per target
sd1 at scsibus2 target 0 lun 0: <HUAWEI, SD Storage, 2.31> disk removable
sd1: drive offline
sd1: unable to open device, error = 19

usbdevs -d -v
-------------
Controller /dev/usb3:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), vendor 
0x1002(0x1002), rev 1.00
  uhub3
 port 1 addr 2: high speed, power 500 mA, config 1, HUAWEI Mobile(0x14fe), 
HUAWEI(0x12d1), rev 1.02
   umass1
   umass2
 port 2 powered
 port 3 powered
 port 4 powered
 port 5 powered

config -x kern conf
-------------------
# USB 3G datacards
u3ginit* at uhub? port ?
u3g*    at uhub? port ?
ucom*   at u3g?

Can the more experience NetBSD folks share how they got the 
USB 3G Modem to work ? All suggestions and pointers to 
address this issue will be appreciated.


thanks
Saifi.