: Some older Huawei devices can be unlocked using free tools like ioin.net or the Huawei Modem Calculator v2 on GitHub .
This does change firmware, so carrier branding remains, but SIM lock is gone. E5336bs-2 Unlock Firmware
Unlocking the E5336bs-2 is a technical process that involves calculating a unique unlock code based on the device’s IMEI number. Here is a drafted workflow for the project: : Some older Huawei devices can be unlocked
If you aren't trying to change carriers but just want the latest features or bug fixes, you can update the device officially: so carrier branding remains