For some new HUAWEI devices you probably could try to unlock it using third party patched software or so but such methods may lead to disabling your modem and/or loosing your warranty. You may also find sites with free unlock code generators but in most cases those codes are for old devices and doesn’t work correctly for newer devices. Such invalid codes may disable unlock by code methods. In such case unlocking your phone will require manual servicing (which is more expensive) or may even lock your modem permanently.
The Best Way to Unlock Windows 7 Computer June 14, 2017
How to Unlock Alcatel Link L855 Locked to EE Carrier of UK January 17, 2017
How to Unlock Alcatel OneTouchLink Y901 4G+ Mobile Hotspot December 27, 2016