UNLOCK HUAWEI AIRTEL E1731 E173bu-1 CUSTOMIZED FIRMWARE SOLUTION FREE – As zte, micromax is the famous brand for modem, huawei is also a leading brand. Many sim / network providers is using huawei modem for his network. After idea, vodafone, aircel now Bharti airtel has also come with E1731 with customized firmware and its firmware version number is and software version is Fakiro . When you will open the cover and see then there E173Bu-1 will be written and it comes with customized firmware. But, the problem is that it is locked and can not be used with other network provider sim. I will guide you to unlock your new Airtel E1731 with the help of the firmware update.
Universal master code calculator
Universal master code calculator
Step by step guide to unlock  HUAWEI AIRTEL E1731 E173bu-1 CUSTOMIZED FIRMWARE TOTALLY FREE :
  1. Download Universal Master Code Calculator software and firmware upgrade of E1731 (E173Bu-1) modem dongle from the download link which is provided at the end of the article.
  2. Now run Universal master code tool and generate unlock code and flash code of your IMEI.
  3. Now plug your device to your PC / laptop / Desktop and let it launch the software of modem.
  4. Now close the running software / mobile partner of the software and run firmware update E173Update_11.
  5. Now its will find your modem automatically.
  6. Click on next and when it ask you for password put flash code as your password which you had generated earlier.
  7. After a few seconds your modem will be updated with unlocked firmware.


Now update the modem with latest Huawei Mobile Partner Software from this link.
Now after fully updated your dongle, unplug and plug your modem with another than default sim (other than Airtel sim) in your computer / laptop. Now your dongle / modem will ask you unlock code / password. Put the unlock code as password which you had generated earlier and your  Airtel E1731 (E173Bu-1) Huawei Customised Firmware Modem Dongle is unlocked forever.

Download E173Bu-1 Unlocked Firmware
Universal master code to generate unlock code and flash code


Update : If above mentioned firmware does not ask for password or unlock code the you download this firmware (Firmware Version is E1731Update_11. It will work 100% for you.


  1. Hi kamalesh.
    My huwae E1731 imei is 354369048255153. I am also facing problem after unlocking. still not able to use any other sim cards. getting “only specifies sim/usim card can be used on the device!”. Can you pelase help what can be done to use a bsnl sim card?

  2. sir i can not upgrade while upgrading every time a error box appeared says upgrade failed. help me
    my .imei is 868510011279410 i have flash code which is 62507087

  3. Both is not Working

    Current firmware version :
    Current Software version :

    Imei:- 354369049524623

    Any Other firmware Avilable

  4. Sir i want to activate voice feature on my airtel E173Bu-1 Its already unlocked can u please suggest me the huawei tool for this regards,
    Vaibhav Ghodke

  5. my airtel dongle e173bu-1 and imei number 350123009876543 please give me unlocking code
    and universal master code is not work.

  6. How to unlock E173Bu-1 | E1731 | EMEI : 8685XX | Firmware Ver. :
    Unable to unlock from any available version says Update Failue, DU Unlocker # code says +CME Operation not allowed, reset counter not working.Nokia Suite Trick also not working, is there any way to unlock.