Hello, friend!
If you cannot log in to the device using the default account admin, the device may be a customized version.
Note that you need to upgrade the device firmware by referring to the upgrade guide. If you upgrade the device firmware incorrectly, the device configuration data will be lost.
You can restore the device through a hard reset. If the device is still not restored after the reset, you are advised to send the device to your local ISP service center or Huawei service center for repair.
Thanks!