FreeBSD and USB GSM modem as Samsung GT-E1282T

Good day!

Available equipment: Samsung GT-E1282T.
GPRS available on this device.

usbconfig output:
ugen1.3: <product 0x3d00 vendor 0x1782> at usbus1, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (100mA)
What are the chances of launch of this device as GSM modem?

kldload umodem.ko ucom.kou3g.ko
without a result.
Make sure the modules are loaded before you plug in the device.
Maybe to save yourself some headache guessing the protocol. I would boot up to either Windows or Ubuntu and scope the device finding out what it uses then work that back into a FreeBSD solution. Might just require a usbdevs modification/recompile. I would check usbdevs first to see if supported.
It is not strange, but it's SAMSUNG.
The camera in this phone is absent physically :)
I said nonsense.
VID-1782 is a producer named Spreadtrum Communications Inc.
Fined on
Only in source code of FreeBSD there is no mention of this manufacturer.

kldload if_urndis
kldload if_cdce
kldload if_ipheth

do not give result.

Still not convinced that it can only access the phone memory...
And we can find out and poll the device using usbconfig?
With help of usbconfig commands.
Did you compile your own kernel with usbdevs of the device? The device is currently unsupported. Nothing to poll.
Not even the Vendor is found. So add both VID and PID recompile your kernel and see what happens. It is quite easy to try. You still don't know which communications protocol to try so save yourself some heartache and try other operating systems to see how it communicates.
Ubuntu Live is your friend. If it don't work there then you might want to try Windows. You need to find out. It may be a proprietary Windows scheme and unusable.
Good day!
I use this instruction
Building new kernel and use custom umodem.ko, ucom.ko and u3g.ko after edit
/usr/src/sys/dev/usb/usbdevs and /usr/src/sys/dev/usb/serial/u3g.c

The result of his research:

After insert device Samsung GT-E1282T were created device:

Then, I test connect for AT-command by cu -l /dev/cuaU0.0
Result - message "Connected" and .. nothing.
Console is frozen ...
After eject device - unfrozen.

So it's not a modem :)

On the manufacturer's website I found the answers for this model.
They said that the USB connector is for charging the battery and transferring files.
And only.

This model GSM phone cannot be used as USB GSM modem.
Just for completeness did you try cu -l /dev/cuaU0.1?
I see two interfaces in your output. To have the terminal lock up on the wrong interface is common. Can't hurt to try.
Also, handshaking is important. If your device expects software handshaking but you have hardware handshaking configured, the terminal will appear frozen. More info in the stty(1) man page, look for crtscts and -crtscts.