This post provides Huawei Firmware E5577s-321 Update 21.316.01.00.00, which can be downloaded from the link which is provided at the end of the post. Once downloaded, extract in a folder using unzip software, and process as mentioned in the respective post. Wrong firmware / software change of a Huawei / ZTE, modem / router, may dead your device permanently. While running the Huawei firmware update, it will prompt for firmware/flash code as password. You can generate the firmware code from universal master code tool.

Disclaimer : Administration of routerunlock shall not be liable in case of unknowing change of the firmware of your modem / router / MiFi. Moreover, if you want any specific firmware of related to Huawei dongle / Pocket MiFi, then leave a comment, if it will be available then will be published. All the firmware which are publicly posted at routerunlock, are free of cost and there is no need to pay anyone.

4 COMMENTS

  1. I’m stuck at hauwei screen will an update fix this
    I’ve tried the reset button 30 seconds and 1 min it does not work.
    E5577s-321 unlocked but came with MTN sticker on the front I ordered from Amazon.