Unlocking your router via firmware or an unlock code can save you from high roaming charges and provide the freedom to switch to the best local data plans.
Find the 15-digit number on the bottom label of the router or by checking Advanced > System > Device Information in the Huawei Web UI.
Use a trusted third-party service like DirectUnlocks or ExpressUnlocks to generate a code based on your IMEI. B311-221 Unlock Firmware
The is a popular 4G LTE wireless gateway, often sold by network providers like T-Mobile, Telstra, or Vodafone. While it is a reliable device, many units come "locked" to a specific carrier, preventing you from using a SIM card from a different provider.
This method is the safest as it does not risk "bricking" your device through a failed flash. Unlocking your router via firmware or an unlock
Place a SIM card from a different carrier into the router and power it on.
There are two primary ways to approach the unlock: using an official unlock code (safest) or flashing specialized firmware. The is a popular 4G LTE wireless gateway,
If your router’s current firmware has hidden the unlock menu, you may need to flash a general version. Huawei B311-221 Firmware Release Notes | PDF - Scribd