Today, I will talk about two Huawei modem code writer software which I have already introduced in the previous posts. Both, “Huawei Modem Code Writer Tool” and “CardLock Unlock Tool” are  great but I want to highlight something with you. Yesterday, I was unlocking one stubborn Huawei E173bu-1 modem. I flashed it properly and there was no error. After flashing the Huawei Airtel, my modem firmware was After changing the SIM card, Airtel E173Bu-1 modem was not asking for any unlock code.

Then I tried to write the unlock code using “Huawei Modem Code Writer V1.0b by Segmaster” and I have got failed error.

Huawei Modem Code Writer V1.0b by Segamaster
Huawei Modem Code Writer V1.0b by Segmaster

Before this, I had got success in other modems, so I have tried to write the unlock code in Airtel Huawei E173BU-1 dongle many times, but the result was same, fail.

Download Huawei Modem Code Writer V1.0b by segmaster

After the various failure unlocking attempts, I decided to try “CardLock Unlock Tool” to write the unlock code in my Airtel-branded modem. I was totally surprised as in only first attempt I had got the success in writing the unlock code.

CardLock Unlock ToolDownload CardLock Unlock Tool for Huawei Modem

Now, you should decide, which one is the best Huawei NCK sender and which one you should use.

CardLock Unlock tool is available to download for Mac PC user. You can get it from this link.


  1. Thanks for helping me to unlock my Vodafone K5150 4G connect pen. 🙂

    A couple of questions.

    I bought the pen in Portugal. When I arrive in Greece and insert a Greek Vodafone sim card, what will happen?

    If I put in a sim card from another local Greek company, what will happen?



  2. Found modem : E173z-1

    Model : Huawei E303

    IMEI : 867648011089503

    Serial NR. : U9CBYA9271614675

    Firmware :

    Compile date / time : Apr 19 2012 14:52:36

    Hardware ver. : CH2E303SM

    Dashboard version :

    Chipset : HiSilicon

    Voice feature : enabled

    SIM Lock status : Locked (CardLock)

    Wrong codes entered : 0 (unlock attempts left : 10)

    Help me unlock this old modem baby!

  3. hello friend, i have huawei bm632w router working with swift 4G broadband in lagos nigeria…. the admin user name and password has been change and i cant ve access to it… plz how can i hack into the admin and change the user name and password?? am using window 7 ultimate

  4. Hello Kamlesh Kumar i have a problem unlocking my vodafone modem from huawei model k4201it’s not asking for unlock code so please help me out

  5. Need assistance immediately, could anyone help me with the unlock code, my imei : 867497010406767 (huawei E3276s-920). I’d be grateful for the help, God Bless..

  6. Can anyone help me please with the unlock code for E392u-12 (TMN) with the imei: 860999002304998
    Unlock code 56052313 does not work.

  7. I bought a Huawei E1820 unlocked modem and used it for an year, it is locked now. When connected, it says: ‘The Sim/Usim Card has not been detected’…Any thoughts on the issue or any clue on the solution?

  8. dear Kamlesh
    I use ur universal code generator to unlock my E5832 pocket wifi locked by mobily saudi arabia ; its giving unlock code 54239225 for IMEI :354104030485868. but when i entered the unlock code via cardlock_unlock its giving out error that Unlock code is incorrect.

    Pls guide me

  9. HI bro!!! I need your help I am using PTCL 4g Huawei modem.
    Model is E397Bu-502 and imei is 990000793457344. Kindy help me….

  10. Hey i have installed the mobile partner and installed the update firmware whatever of airtel v e173Bu-1 but it didnt ask for any password. no other firmware is working on mine but just one. and when i checked it via dc-unlocker it says wrong code entries 10 (left 0) and i used many softwares but it aint reseting the counter. i am trying to use a reliance sim whose status is locked. plz help..!! what to do??

  11. Hi there!
    Thanks for your handy info.
    I have a Huawei E372 data card, the IMEI is 353147041580947
    Can I ask for the unlock code please?

  12. Hi there.

    Please help on huawei e173u-2 with firmware version please.It does not give space for unlock code. Its urgent. Thanks in advance.

  13. Hello good day people….well i really need a little help from you Kamlesh..can help with this modem code..?867612005639632 thank you.

  14. Hi Mr Kumar I am trying to unlock the below

    3 Dongle E3231
    imei: 864761014136305

    It is asking for a sim lock code can you help please.


  15. Hi Kumar, i am trying to unlock the below Dongal.

    Found Phone, Phone Info:
    – Manufacturer :huawei
    – Model :E303D
    – Revision :
    – Phone IMEI :860369011569074
    it is asking for a SIM lock code.Please healp


  16. Hi Kumar, It is possible unblocking T-Mobile 3G modem ? Please help me.

    Found Phone, Phone Info:
    – Manufacturer :huawei
    – Model :E1823
    – Revision :11.825.03.10.55
    – Phone IMEI :357509031180887

  17. hai

    i tried to unlock my huwaei modem 2 days ago with huawai modem unlocker v.5.8.1 but i see on the sreen :
    IMEI = 867497010801876
    NCK = 34415337

    Unlocking in progress
    – Failed to write NCK code to modem
    – Checking sim lock status

    – Modem status : sim in modem not accepted . locked
    – Lock ounter : 0 – left of 10 attempts ( before i am wrong put unlocked code till 10 times )

    Can you advice me what must i do to solve this issues.

  18. E372 –

    IMEI : 353147044565689
    IMEI : 353147042739385

    pls help

    i put unlock code from universal mastercode and v4mpire_unlocker, still wrong unlock code. 🙁 pls help







    Model No. :


    IMEI :








    pls sir help me and unlock it

  20. I have tried all the procedures you have layed down but mine doesnt seem to respond to unlocking. can you help me? its a huawei E3251. thanks a lot

  21. Hi Kamlesh,

    I followed all the setps suggested by you to unloack the “airtel-e173bu-1-huawei” dongle. And finally got upgraded to your mobile partner(designed by kamlesh kumar).

    I am able to add other networks(like aircel, relicance etc) through profile management, but when i am inserting other network sim, it throws error like “only specified sim/Usim should be used”. So conclusion – my dongle not unlocked. kindly please help me. i used your unlocker tool also, but no use. Please help me and unlock my dongle.


  22. Hi Kamalesh, I recently bought an used Airtel 4G hotspot from Bangalore and the model number: DATA MAX 01, Some China make. I am in chennai and it is not accepting even Airtel SIM. I want to unlock it, There is no ehternet port on this device. Please help me to get it done. – Rajan @Chennai

  23. Hello, I want to unlock the modem, here are the details

    Found Phone, Phone Info:

    – Manufacturer :huawei

    – Model :E353

    – Revision :

    – Phone IMEI :357260041273045

    Please tell me if you can unlock this one

  24. Hi Kamlesh

    I am trying to unlock Airtel Huawei E1731 (E173 Bu-1)
    I completed all steps. After reloading the partner software, i did not get prompt for unlock code / pass. I tried Cardlock_unlock tool. It is giving error message = Open Port Failed !. Tried 2-3 times, after ensuring the partner software is exited. Same error.

    What to do now?

    The partner software is opening, but not able to connect using vodafone SIM
    Using following info
    IMEI = 354369047005500
    Unlock = 45262613
    Flash = 49914603

    Please advise



  25. Hi Kamlesh,
    I am trying to unlock my Tata Photon max3G Wifi Data Card-it is Huawai E8231
    I find out unlock code & flash through universal master code,now I installed huawai master code writer but it is unable to detect com port.I also run CardLock Unlock tool but it showing data card not found.Pls help me.

  26. Good evening kamlesh, i have the router B573 CPE LTE locked by H3G Italy , i am a beginner i have all data IMEI, software and hardware version . Can be unlocked? Thanks Dereck

    • Reset the device, Change the default SIM with another network, plug to PC with LAN cable, login to router and search option for NCK / unlock / SIMLock

      If device is asking for code then Pay 2.38$ for router code through paypal button of
      and mention model and imei in transaction

  27. I am trying to unlock Airtel HuaweiE5577Cs-321 IMEI: 867262024897439
    Hello, I want to unlock the modem, here are the details

    Found Phone, Phone Info:

    – Manufacturer :huawei

    – Model :E5577cs-321

    – Revision :

    – Phone IMEI : 867262024897439
    Please tell me if you can unlock this one

    • Change the default SIM with any another network provider SIM, it should ask you unlock code, then enter the code and it will done. Or you can use cardlock unlock tool for MAC from the above post.

  28. hi,

    Can you provide me the unlock code for the Huawei usb modem model – E353u-1 IMEI – 355513046381672.


  29. Found modem : E392
    Model : Huawei E392
    IMEI : 868498000221967
    Serial NR. : H5B5TB1240608099
    Firmware : 11.836.13.00.76
    Hardware ver. : CD2E392UM
    Voice feature : not supported in current firmware
    SIM Lock status : Locked (CardLock)
    Wrong codes entered : 4 (unlock attempts left : 6)

  30. hi,
    i have used all the attempts now zero attempts are left and the router is permenently locked is there any solution for permanently locked devices ?
    please help/

  31. Pls. i need your help my modem: Unlock (E353Wu-1) 3 (Three) Huawei UK Modem Dongle Data Card, is not connect, and i want to unlock it, pls help. Thank.

  32. Please i need your help i want to unlock my modem ”E353 (E353Wu-1) 3 (Three) Huawei UK Modem Dongle Data Card” help me please, i need the software. Thank you.

  33. Please i need your help

    Unlock device ( B890 – 75 )

    The device is locked. To obtain the SIM lock code, contact your service provider.
    After the correct code is entered, the device will reset automatically.
    However, if an incorrect code is entered on 10 successive attempts, the device will be locked permanently.

    SIM lock code:
    Remaining attempts: 0

  34. Detecting modem :

    selection :
    manufacturer – Huawei modems
    model – Auto detect (recommended)

    Interface :
    Found modem : E303
    Model : Huawei E303 HiLink
    IMEI : 865994013975964
    Serial NR. : E9P7SA9361508808
    Firmware :
    Hardware ver. : CH2E303SM
    Web UI version :
    SIM Lock status : Locked (Card Lock)
    Wrong codes entered : 10 (unlock attempts left : 0)

    please, help me how can I unlock this modem?

  35. Found modem : K4201 I
    Model : Vodafone K4201-Z
    IMEI : 862928020944558
    Firmware : BD_K4201IV1.0.0B01
    Compile date / time : Nov 25 2013 20:57:16
    Chipset : Qualcomm MSM8200A
    NAND Flash : HYNIX_HY27SF081G2A
    SIM Lock status : Locked (Card Lock)
    what next kamlesh ….plz help me

  36. at the time of unlocking modem their are two codes 1 unlock code 2 flash code
    so which one has to be applied for unlocking datacard.

  37. Found modem : E3131
    Model : Huawei E3131
    IMEI : 863625021867247
    Serial NR. : G8J7SA93B2726915
    Firmware :
    Compile date / time : Jul 15 2013 14:54:16
    Hardware ver. : CH2E303SM
    Dashboard version : UTPS23.
    Chipset : HiSilicon
    Voice feature : enabled
    SIM Lock status : Locked (CardLock)
    Wrong codes entered : 6 (unlock attempts left : 4)


    Found modem : E3131
    Model : Huawei E3131
    IMEI : 862733014494762
    Serial NR. : N8SBYA9340806149
    Firmware :
    Compile date / time : Aug 8 2012 15:52:22
    Hardware ver. : CH2E303SM
    Dashboard version : UTPS23.
    SIM Lock status : locked
    Wrong codes entered : 10 (unlock attempts left : 0)

  39. i generated unlock code for my huawei k4201 IMEI: 867637000611443 but didn’t work and now i have 3 attempts left, can you please help me with a new unlock code.

  40. Hello sir,
    can you please assist to unlock my airtel MODEL: e355s-1
    IMEI: 869560001859381
    your quick feedback will be much appreciated.
    thank you.

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