Information

Mass-storage switch

$ sudo apt-get install usb-modeswitch

Plugin modem again and you should get a bunch of serial ports:

[ 5445.108101] usb 2-2: new high speed USB device number 3 using ehci_hcd
[ 5445.242467] usb 2-2: New USB device found, idVendor=12d1, idProduct=1446
[ 5445.242477] usb 2-2: New USB device strings: Mfr=3, Product=2, SerialNumber=0
[ 5445.242484] usb 2-2: Product: HUAWEI Mobile
[ 5445.242489] usb 2-2: Manufacturer: HUAWEI Technology
[ 5445.244981] scsi7 : usb-storage 2-2:1.0
[ 5445.245515] scsi8 : usb-storage 2-2:1.1
[ 5446.017603] usb 2-2: USB disconnect, device number 3
[ 5450.036132] usb 2-2: new high speed USB device number 4 using ehci_hcd
[ 5450.170725] usb 2-2: New USB device found, idVendor=12d1, idProduct=1436
[ 5450.170736] usb 2-2: New USB device strings: Mfr=4, Product=3, SerialNumber=0
[ 5450.170743] usb 2-2: Product: HUAWEI Mobile
[ 5450.170748] usb 2-2: Manufacturer: HUAWEI Technology
[ 5450.175800] scsi14 : usb-storage 2-2:1.5
[ 5450.176793] scsi15 : usb-storage 2-2:1.6
[ 5450.271164] usbcore: registered new interface driver usbserial
[ 5450.271176] USB Serial support registered for generic
[ 5450.271234] usbcore: registered new interface driver usbserial_generic
[ 5450.271236] usbserial: USB Serial Driver core
[ 5450.296230] cdc_ether 2-2:1.1: wwan0: register 'cdc_ether' at usb-0000:00:1d.7-2, Mobile Broadband Network Device, 02:50:f3:00:00:00
[ 5450.296411] usbcore: registered new interface driver cdc_ether
[ 5450.362679] USB Serial support registered for GSM modem (1-port)
[ 5450.362792] option 2-2:1.0: GSM modem (1-port) converter detected
[ 5450.362908] usb 2-2: GSM modem (1-port) converter now attached to ttyUSB0
[ 5450.362928] option 2-2:1.3: GSM modem (1-port) converter detected
[ 5450.362987] usb 2-2: GSM modem (1-port) converter now attached to ttyUSB1
[ 5450.362997] option 2-2:1.4: GSM modem (1-port) converter detected
[ 5450.363051] usb 2-2: GSM modem (1-port) converter now attached to ttyUSB2
[ 5450.363073] usbcore: registered new interface driver option
[ 5450.363074] option: v0.7.2:USB Driver for GSM modems

Devices

Huawei E171

Found modem : E171
Model : Huawei E171
IMEI : 354807044078459
Serial NR. : 4BA5TA10B2706637
Firmware : 11.126.85.01.143
Compile date / time : Jun 21 2010 20:27:27
Dashboard version : UTPS11.300.05.15.143_MAC11.301.09.01.143
Chipset : Qualcomm MSM6290
Voice feature : disabled
SIM Lock status : unlocked
Wrong codes entered : 0 (unlock attempts left : 10)

Check if voice is enabled

ati
Manufacturer: huawei
Model: E171
Revision: 11.126.85.01.143
IMEI: 354807044078459
+GCAP: +CGSM,+DS,+ES

AT^CVOICE?
^CVOICE:0,8000,16,20

Huawei E1752

Found modem : E1752
Model : Huawei E1752
IMEI : 353145034241600
Serial NR. : O47NAA19A1600110
Firmware : 11.126.13.00.00
Compile date / time : Jul 05 2010 10:16:42
Dashboard version : UTPS11.300.05.22.56_MAC11.300.08.19.56
Chipset : Qualcomm MSM6290
Voice feature : disabled
SIM Lock status : unlocked
Wrong codes entered : 0 (unlock attempts left : 10)

ZTE K3565-Z

http://3g-modem.wetpaint.com/page/ZTE+K3565-Z+(Vodafone)

Manufacturer: ZTE INCORPORATED
Model: K3565-Z
Revision: BD_P673A2V1.0.0B09
IMEI: 357867029244846
+GCAP: +CGSM,+DS,+ES

OK

AT^CVOICE=?
ERROR

Huawei AT commands

AT^CVOICE=0 Enable Voice
AT^CVOICE=1 Disable Voice
AT^CVOICE=? Check status
=========
AT^U2DIAG=0 – switch the device in modem mode only
AT^U2DIAG=1 – device in modem mode + CD-ROM
AT^U2DIAG=255 – modem mode + CD-ROM + Card Reader
AT^U2DIAG=256 – modem mode + Card Reader