Unlocking codes for newer Huawei routers are rarely free because they use advanced encryption algorithms (v4 or v5) that older "calculators" cannot process. You have three main options: Unlock Huawei Modems - 3Community - Three Ireland
: Connect your computer to the router and navigate to 192.168.8.1 in your browser.
: Place a SIM from a different network into the router's slot.