How to Unlock Huawei 3G Modem E173, E1550, and E1750? Like ZTE and Micromax, the Huawei is a leading manufacturer of 3G Modem as we all know. Before starting the unlocking process of Huawei modems, there are few things which you should know. First, make sure that your data card is detected in your desktop / laptop / PC and you should know your IMEI number (IMEI number is a 15 digit number printed on the device). To know the 15 digit IMEI of your modem, see the back side of the modem.
Universal master code calculator
Universal master code calculator

How to unlock your Huawei E173, E1750 or E1550 data card?

1. Download Universal Master Code.exe from the download link which is provided at the end of the article. Enter your 15 Digit IMEI number in Huawei tab, as shown in the below screen and press Calculate for Unlock Code and Flash Code.

2. Plug your data card with an unaccepted SIM to your PC.

3. For E173, It will prompt for an unlock code, just enter the Unlock Code you got from Universal Master Code.exe. (Your Huawei E173 modem is now unlocked and can be used with any another SIM after creating the profile).

Note : But, E1750 and E1550 models do not prompt for unlock code, hence, you have to download Huawei Modem Code Writer from the below link and continue to step 4.

4. Extract the zip file and run HUAWEI_MODEM_Code_Writer.exe
Huawei modem code writer by segamaster
5. Press ” Please select Com Port “
Select com port - Huawei modem code writer by segamaster

6. Press ” Detect” and choose your modem COM port from dropdown. Then press “Accept”.

7. Press “Unlock Modem”, a pop-up window will appear asking you to enter the Unlock Code.

8. Enter the Unlock code from Universal Master Code in the field provided and click ” OK “.

9. Click “Unlock Modem”. Your Huawei modem E1750 or E1550 is now unlocked and can be used with any another SIM after creating a new profile.

Note : The above guide cannot be applied in customized firmware modem, to unlock customised firmware you need to flash the modem first, then it will accept the unlock code.


  1. dear please unlock the modem

    Device name: E303

    Application port: COM4

    Serial number: U9C7SA9311514907

    IMEI: 868988016912427

    Hardware Version: CH2E303SM

    Firmware Version:

    Software Version:

  2. I havea vodafone modem, the model is k3770 Huawei (the IMEI is: 860030015120815) I used the Universal Master Code and it said that the
    code is: 40167157 but the Data Card Unlock Tool said it’s NOT correct!! Please help with it. Thanks so much again and hope to hear from you asap
    as I don’t have internet at home because of that. Also how can I get the Huawei original dashboard for this model and E1550? Thanks again!

  3. I wanna unlock my Airtel E173bu-1 Data card
    I have updated my device firmware version from to
    it did not ask for unlock code So I used Code Writer but it shows error plz help me asap.

  4. hello my friend,

    Dados do dispositivo:
    N.º de série do dispositivo (IMEI): 355518064726831
    Nome do produto: Vodafone R216-Z
    N.º de série do SIM (ICCID): 89351060000618959686

  5. Hi Kamlesh,

    tried this method. However when i reached step 5 “Please select com port” there was nothing listed in the drop down menu. It was blank. I am using a E5330 locked to Ooredoo Maldives. Also using Windows 10 on the laptop. Can you please guide me on how i can proceed further.


  6. Hi Kamlesh,

    Tried this method. Reached step 5 “Select com port”. However when i go to step 6, and click on detect, there is nothing listed in the drop down menu. I am using Huawei, E5330 locked to Ooredoo Maldives. and using Windows 10 on my laptop. Can you please guide me further on this. Thanks!

  7. disculpa zte wp 626 353363015324663 Movistar
    zte wp 659 869606016070215 Movistar

    Argentina , Gracias por la ayuda ante mano

  8. ZTE wp 626 Imei 353363015324663 Movistar
    ZTE wp 659 Imei 869606016070215 Movistar

    Gracias de ante mano por la ayuda

  9. Can you please help to unlock my ZTE – MF90+

    IMEI 868527023488888

    Software Version WEB_H3GATMF90PLUSV1.0.0B03
    Firmware Version BD_H3GMF90PLUSV1.0.0B03
    Hardware Version MF90PLUS1.0.0

  10. Hello, Kindly assist me to unlock my HUAWEI E5573s-606
    IMEI: 866079020391543
    IMSI : 621245010211335
    Hardware version: CL1E5573SM
    Software version:
    Web UI version:

    Thanks for your help. Regards

  11. Hello Sir, kindly assist to unlock this device.
    Device name: E5573s-606
    IMEI: 866079020391543
    IMSI : 621245010211335
    Hardware version: CL1E5573SM
    Software version:
    Web UI version:

    Thanks for your help

  12. Could you assist to unlock this ZTE smart phone.
    Model: Z932L
    IMEI: 990005150331420

    Thanks in advanced for fast reply.

  13. Could you assist to unlock this huawei modem.
    Model: e5573
    IMEI: 866079021040602

    Thanks in anticipation for reply.

  14. Helo Sir, i unlocked the huawei ec156 modem but upon inserting tata photon default software is installed. now how to access internet when reliance sim is inserted, and will i get the same high speed which i was getting from tata connection previously.

  15. please can you tell me the unlock code for huawei 173 broad band which IME is not written in it how can i undergo ot sir .. hope to hear from you soon

  16. HI I have a Airtel Airtel’s Huawei E5573 and Airtel 4G CPE Device for outdoor unit and modem.

    Could you please advise on unlocking process .


  17. Nom de l’appareil : E5573s-856
    IMEI: 866837022439341
    IMSI: 624017501325205
    Mon numéro: Inconnu
    Version matérielle : CL3E5573SM02
    Version du logiciel: 21.315.15.00.225
    Version IU Web:
    Adresse MAC du LAN: 24:00:BA:B0:AA:18
    Adresse IP WAN:

  18. hi,

    i have a model E3372h-153 with Firmware and want to update to Firmware and he asks me for a Password.

    do have you a unlock code for this model?
    IMEI Nr.: 861821032710904


  19. HI

    I m unable to unlock MY device , Please help to unlock the device.
    Device details are below..

    Device name: E5573s-606
    IMEI: 866079021322851
    IMSI : 405861000782460
    Hardware version: CL1E5573SM
    Software version: 21.315.01.01.284
    Web UI version:

    Looking forward for your prompt reply.

    Umesh Sharma

  20. Dear Sir, Please unlock the following device for another ISP USe of SIM
    Device name: E5573s-606
    IMEI: 866079027596813
    IMSI : 404022000563437
    My number: Unknown
    Hardware version: CL1E5573SM
    Software version: 21.315.01.01.284
    Web UI version:

  21. bonsoir , moi vraiment j ai du serieux probleme avec mon modem airtel , quel merde ?
    j ai du telecharger le master code locker et huawei unlocker , hummmmmm , c est pas du tout facile , maintnent il me reste que 3 fois a essayer et puis c est fin pour moi avec mon modem , a dieu l universiter (l universel).
    svp , y a quelqu un ici qui poura m aider a s ensortie ? mon IMEI est (867612007728664) , moi meme j avais deja trouver 35047265 et la flash 63524783 mais , ca marche toujour pas , merci de m aider , je desirai etre aussi un genie de deblocage des modem mais /////////// oufffffffff pas facile ….

    MODEM NAME: R216 4G