How to switch Huawei CDMA 2252+ to USB from CD-ROM?

I have Huawei CDMA 2252+ phone and I want to connect it to Linux to send SMS. In Fedora 15 (64bit) it is taken as CD-ROM. This is the output of dmesg after the phone is plugged in. [10887.524339] USB Mass Storage support registered. [10888.614507] scsi 3:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [10888.786098] sr1: scsi-1 drive [10888.788583] sr 3:0:0:0: Attached scsi CD-ROM sr1 [10888.788904] sr 3:0:0:0: Attached scsi generic sg2 type 5 [10899.106066] sr1: CDROM (ioctl) error, command: Xpwrite, Read disk info 51 00 00 00 00 00 00 00 02 00 [10899.106073] sr: Sense Key : Hardware Error [current] [10899.106075] sr: Add. Sense: No additional sense information This is the output of lsusb: Bus 002 Device 004: ID 12d1:1010 Huawei Technologies Co., Ltd. Then I tried to use usb_modeswitch to change the device to USB as following. (My device is not in the usb_modewitch supported device list.) The output of usb_modeswitch --verbose -H -v 0x12d1 -p 0x1010: * usb_modeswitch: handle USB devices with multiple modes * Version 1.1.6 (C) Josua Dietze 2010 * Based on libusb0 (0.1.12 and above) ! PLEASE REPORT NEW CONFIGURATIONS ! DefaultVendor= 0x12d1 DefaultProduct= 0x1010 TargetVendor= not set TargetProduct= not set TargetClass= not set TargetProductList="" DetachStorageOnly=0 HuaweiMode=1 SierraMode=0 SonyMode=0 GCTMode=0 KobilMode=0 MessageEndpoint= not set MessageContent="" NeedResponse=0 ResponseEndpoint= not set Interface=0x00 InquireDevice enabled (default) Success check disabled System integration mode disabled Looking for default devices ... searching devices, found USB ID 1d6b:0002 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 12d1:1010 found matching vendor ID found matching product ID adding device searching devices, found USB ID 0e0f:0003 searching devices, found USB ID 0e0f:0002 Found devices in default mode, class or configuration (1) Accessing device 005 on bus 002 ... Getting the current device configuration ... OK, got current device configuration (1) Using endpoints 0x0b (out) and 0x8a (in) Using endpoints 0x0b (out) and 0x8a (in) Not a storage device, skipping SCSI inquiry USB description data (for identification) ------------------------- Manufacturer: Huawei, Incorporated Product: Huawei Technologies Serial No.: not provided ------------------------- Sending Huawei control message ... OK, Huawei control message sent -> Run lsusb to note any changes. Bye. After this I ran the lsusb and I did not notice any changes. However following are notified in dmesg: [ 180.438107] usb 2-2.1: USB disconnect, address 4 [ 199.385604] usb 2-2.1: new full speed USB device using uhci_hcd and address 5 [ 199.648757] usb 2-2.1: New USB device found, idVendor=12d1, idProduct=1010 [ 199.648759] usb 2-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 199.648761] usb 2-2.1: Product: Huawei Technologies [ 199.648762] usb 2-2.1: Manufacturer: Huawei, Incorporated The following is taken from /var/log/messages. kernel: [ 180.438107] usb 2-2.1: USB disconnect, address 4 kernel: [ 199.385604] usb 2-2.1: new full speed USB device using uhci_hcd and address 5 kernel: [ 199.648757] usb 2-2.1: New USB device found, idVendor=12d1, idProduct=1010 kernel: [ 199.648759] usb 2-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 kernel: [ 199.648761] usb 2-2.1: Product: Huawei Technologies kernel: [ 199.648762] usb 2-2.1: Manufacturer: Huawei, Incorporated mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1" mtp-probe: bus: 2, device: 5 was not an MTP device I'm not sure whether I have successfully switched the phone from CD-ROM to USB. Is there any way to confirm this? I don't have any ttyUSB file under /dev folder. How to find which file corresponds to the above device? Further, I want to send AT commands to the phone. How to do that?