Hard Method:
(Note: Please do on your own risk Author of this post or blogger are not responsible for any problem causes while unlocking your usb modem)
please note that by debranding your device by the hard method you probably lose your warranty!
The flash memory of the modem will be changed with the hard method. You get it back by doing backup our original flash memory and keep it at safe place.(I have describe the same in below mention method with images). Your modem’s warranty claim may be refuses if your device breaks down during/before restoring the backup/original file of your modem’s flash memory.

  1. First connect your modem and Install the original dashboard from your modem, because later to use your modem will require all drivers to be installed.

  2. Download QPST from here and install it.

  3. Go to  Start button then go to Programs menu then go to QPST and start QPST Configuration" and select the "Ports" tab.(Plug your modem before starting QPST Configuration)
    QPST Configuration

  4. Now click "Add New Port"
    QPST configuration step 2

  5. Find the port labeled "USB/QC Diagnostic" and select it then click "OK".
    (Note: If there are more than one "USB/QC Diagnostic" port showing, you must select the correct one by trying each one. If you get the wrong one the "Modem selection" in step 7 won't show the "Unknown" phone but will be empty.)

    QPST configuration step 3

  6. Go to the menu and Select "Start Clients" and click "EFS EXPLORER"
    QPST configuration step 4

  7. In the following dialog you should see an "Unknown" phone, which you select and then confirm with "OK".
    QPST configuration step 5

    Now QPST will read the EFS file system of your device:
    QPST configuration step 6

  8. After reading QPST will show up some files. Now you must take back up the existing content of the modem, which is saved as a "ZTEMODEM.ISO". Select the "ZTEMODEM.ISO" right click on it and select "Copy File from Phone".

    QPST configuration step 8

    And select the file location where you want to save the backup and click OK.
    QPST configuration step 9

    Now the QPST software will backup ZTEMODEM.ISO to the selected folder, which may take up to 30 minutes.(Note: keep this downloaded backup version of ZTEMODEM.ISO in a safe place – you might need it one day!)
    QPST configuration step 10

  9. After the backup has finished select "ZTEMODEM.ISO" right click on it and select "delete".
    QPST configuration step 11

  10. After deleting old ZTEMODEM.ISO, insert this one (NEW VERSION Aug-2010) [mirror 1 - mirror 2 - mirror 3 - mirror 4 - mirror 5] by drag & drop (First extract ISO from RAR first!). It contains the "ZTE Join Air" dashboard (version 1.00.0B02, English and German including installer DPInst.exe), MWconn 5.6 and MDMA, a monitoring tool with USSD-support. Unfortunatley it lacks MacOS-support. Backup of original ZTEMODEM.ISO: ZTEMODEM.ISO from Vodafone K3565-Z (VMC

  11. Now wait till the new ZTEMODEM.ISO has been written to your device and then close QPST EFS Explorer. If asked to reset the device click on the "Yes".
    QPST configuration step 12

  12. That's it. Now your modem got the new dashboard.


  1. why do we need unlock in zte modem?

  2. Some ZTE modem not allow to use other operator simcard that's why.

  3. AnonymousMay 22, 2012

    I have use the aircel sim on vodafone k3570. But the QPST suggested on this site to download is not fit for windows 7 or cannot find the right QC diagnostic port. Please suggest me quickly how fix my modem speed up to 1.5mbps. THANK U.

  4. Karen tanJune 18, 2012

    I have successfully deleted ztemodem.iso and saved zte join air I downloaded. But when I reset the device, it's doesn't auto run the join air setup.exe. What should I do? I want to put the zte join air into the modem

  5. @Karen tan

    What Windows OS you are using?

  6. @Anonymous
    If you want to unlock ZTE K3570-z then you following wrong method. Click here to know right method becaus above process is for ZTE3565 modem only.

  7. this is working on windows 7

  8. This comment has been removed by the author.

  9. Nice post. I read an article here http://www.supportivehands.net/2012/12/unlock-zte-huawei-zong-micromax-vodafone-modems-phones-free.html, but the tool mentioned there uses credits and needs the credits to be purchased. Thanks again for sharing this useful post

  10. Nice article bro, thanks, I found a similar one here http://www.supportivehands.net/2012/12/unlock-zte-huawei-zong-micromax-vodafone-modems-phones-free.html which also helped me

  11. Hi there, I did all what you write here but my modem still does not work. I have ZTE MF100 and still locked. When i place SIM from other operator it says Invalid SIM. Do you have any idea what to do? Thanks

  12. this tutorial is for ZTE-K3565 modem.

  13. Hi there!You helped me to replace dashboard and unlock my ZTE modem...many thanks! Here is SKIN for ZTE Connection manager-JoinAir, and i hope people will like it: http://artsen.deviantart.com/art/Default-349918034?ga_submit_new=10%253A1358881875&ga_type=edit&ga_changes=1&ga_recent=1

  14. Hi, I did all above step by step. I have now instaled new dashboard. When I want to connect it says invalid SIM? What should I do? Is signal detected only after succsesful SIM card detection? Thanks