My ZTE Modem is not detected as CDMA Modem instead it is detected as USB storage device How I can change its mode to CDMA from Mass storage mode,

Here is the demsg output

  [  488.321117] usb 3-2: USB disconnect, device number 9
  [  496.930211] usb 3-2: new full-speed USB device number 10 using xhci_hcd
  [  496.947491] usb 3-2: New USB device found, idVendor=19d2, idProduct=fff5
  [  496.947505] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  [  496.947514] usb 3-2: Product: USB Storage
  [  496.947521] usb 3-2: Manufacturer: ZTE, Incorporated
  [  496.947528] usb 3-2: SerialNumber: 000000000002
  [  496.949155] usb-storage 3-2:1.0: USB Mass Storage device detected
  [  496.949431] scsi9 : usb-storage 3-2:1.0
  [  497.949158] scsi 9:0:0:0: CD-ROM            ZTE      USB Storage FFE9 2.31      PQ:     0 ANSI: 2
  [  497.951145] scsi 9:0:0:1: Direct-Access     ZTE      USB Storage FFE9 2.31 PQ:    0 ANSI: 2
  [  497.958415] sr1: scsi-1 drive
  [  497.958688] sr 9:0:0:0: Attached scsi CD-ROM sr1
  [  497.958868] sr 9:0:0:0: Attached scsi generic sg2 type 5
  [  497.964409] sd 9:0:0:1: Attached scsi generic sg3 type 0
  [  497.976462] sd 9:0:0:1: [sdb] Attached SCSI removable disk
  [  498.059848] systemd-udevd[2537]: Failed to apply ACL on /dev/sr1: No such file    or directory
  [  498.059877] systemd-udevd[2537]: Failed to apply ACL on /dev/sr1: No such file     or directory

please help me in this....some times it is automatically changing its mode to modem and most of the time stucking up like this ?

1 Answer 1


I have a tatadocomo 3G data card my dmsg output also looks similar to this. My data card was detected by network manager but I was not able to connect to internet anyhow.

But now I am able to connect to internet with sakis3g. I think this may work for you also.

Sakis3G is a tweaked shell script which is supposed to work out-of-the-box for establishing a 3G connection with any combination of modem or operator. It automatically setups your USB or Bluetooth™ modem, and may even detect operator settings. You should try it when anything else fails!

  1. Download sakis3g from here
  2. Extract it to desktop
  3. Open terminal and run

    cd Desktop


then an interactive window will come then

select > connect to 3G
select > USB device
select > ZTE WCDMA Technologies MSM
select > interface #3 
give apn: tatadocomo3g
username: TIM | password: TIM

this is how I connect my 3g modem with sakis3g as explained here

you have to enter your apn, username, password w.r.t your connection you have

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