Pessoal, vou pastar aqui um comentário (review) que estou enviando para http://dx.com sobre este produto:

http://dx.com/edge-u2-edge-usb-2-0-wireless-modem-adapter-edge-gprs-gsm-54921

Inicialmente a foto do modem USB:

Agora a minha avaliação:

Price Rating: 5 stars
Ease-of-use Rating: 4 stars
Build Quality Rating: 5 stars
Usefulness Rating: 5 stars

Title: Worked fine on Debian Squeeze (Linux)

Prós: Size and design. Worked on Linux, in Brazil, using TIM as telephone operator.

Cons: not yet.

Other Thoughts:
Worked fine on Debian Squeeze. You must follow the steps:

1. # apt-get install usb-modeswitch wvdial
2. Edit /etc/usb_modeswitch.conf and change from DisableSwitching=0 to
DisableSwitching=1.
3. Insert modem in USB port.
4. Mount and unmount the modem (internal CD-ROM emulator) to force a
switch from CD-ROM to modem.
5. # wvdialconf
6. Edit /etc/wvdial.conf
7. # wvdial
8. Be happy!

Bottomline:
Details:

— CD-ROM emulator —

> usb 3-1: New USB device found, idVendor=0471, idProduct=1210
> usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[…]
> scsi 6:0:0:0: CD-ROM            Philips  Dev. 0 LUN 0     1.0  PQ: 0 ANSI: 0
[…]

— Modem —

> usb 3-1: New USB device found, idVendor=1dbc, idProduct=0005
> usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
> usb 3-1: Product: EDGE Modem
> usb 3-1: Manufacturer: Wisue Technology
> usb 3-1: SerialNumber: 000000-00-000000
> cdc_acm 3-1:1.0: ttyACM0: USB ACM device
> usbcore: registered new interface driver cdc_acm
> cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters