I had provided download links of some firmware for Huawei new Algo modems at here. Firmware is an internal software of modem which is an essential part of the dongle and without firmware data card can not function properly. Some network providers launch Huawei modems without customized firmware (unlocked firmware) and some network provider locks the firmware of Huawei modem which is called customized firmware. You might heard that the customized firmware of Idea E303 (E303Ds-1) modem. No hackers till now could unlock the Idea netsetter E303 (E303Ds-1) modem.

huawei e3276 stc 4g lte modem
Huawei e3276  4g LTE modem

But still, you have a good luck. If you have purchased E3276 modem from the market with customized firmware then you can easily unlock it with the help of unlocked firmware (un-customized firmware). There is no need to purchase another modem to use another network sim in locked E3276 Huawei modem.

How to Unlock customized firmware Huawei E3276 modem to use another network SIM?

1. Just go ahead at the end of the article and download the unlocked firmware of Huawei E3276 broadband 4G LTE modem.

2. Now disconnect from the internet and plug your Huawei E3276 modem into PC.

3. Now close the default software of Huawei E3276 (if it runs).

4. Run the downloaded uncustomized firmware (software) update.

5. Now it will ask you for password.

6. Provide flash code as password.

7. Follow the on-screen instructions and after a few minute, your Huawei E3276 modem will be updated with new un-customized firmware.

8. Now you can follow the unlocking of Huawei e3276 modem to unlock your E3276 modem.

Note: Leave a comment with model, IMEI, network and country to get the free codes.

Download Huawei E3276 Modem Firmware E3276s Update_21.436.03.00.00

Download Huawei E3276 Modem Firmware E3276_Update_21.


  1. My modem huawei e3276s -920 STC Saudi Arabia was unlocked, but when I tried to operate it, I works well in 3G and 2g of any sim but My 4G can not work means 4g signal is not coming, in my area 4g mobile operator provides 2300Mhz bands, this should work but i dont know why is it not working . Could you please share solution with me? Thank you very much

      • many thanks,
        and while im ashamed, may i ask that by unlocking the modem it means the modem then can be functioning in many possible lte type/wave frequency? Im curious that i checked the modem after had updating firmware using dc-unlocker. it said the modem already unlocked. should i still use huawei modem code writer or cardlock_unlock-e59xx? since the modem still can’t detect other type 4glte provider.

  2. Please, please ask for the key code Huawei e3276s-150 ITA version and if it is possible to have the last fw link available, thank you.

    Imei: 863781010647817

  3. ola saludos desde bolivia
    Found modem : E3276
    Model : Huawei E3276
    IMEI : 862404020166600
    Serial NR. : X2BDW15214000453
    Firmware : 21.436.11.02.279
    Compile date / time : Feb 10 2014 09:43:55
    Hardware ver. : CH5E3276SM
    Dashboard version : UTPS23.
    SIM Lock status : unlocked
    Wrong codes entered : 10 (unlock attempts left : 0)


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