Devices like the E5577s-932 are often locked by carriers to prevent them from being used on other networks. This is a common practice to ensure that customers use the device with the services they are contracted with. However, once the contract period is over or under certain conditions, users can request the carrier to unlock the device.
Go to professional unlocking platforms:
These are legal and safe. The file is unique to your IMEI.
Some users attempt to flash a generic (unbranded) Huawei firmware.
Yes. Once unlocked via code or firmware file, the device remains unlocked after any reset or firmware update (unless you flash a locked stock firmware again).
The E5577s-932 is a 4G LTE mobile hotspot device. If you're looking to unlock it, here are a few steps: