: Once you receive your verified unlock code, insert a SIM card from a different network. Log into the router's web interface (usually 192.168.8.1 ) and enter the SIMLOCK Code when prompted. 2. Verified Firmware Flashing
If LTE bands are missing after flashing, re-apply the customize.bin from your original carrier, then edit the hw_default_ctree.xml to enable all bands. Verified XML configs are available on Github. huawei router b311221 unlock firmware verified
Download a (e.g., B311-221_UPDATE_21.200.03.00.00.bin) from a trusted source with SHA-256 provided. : Once you receive your verified unlock code,
Even with verified firmware, you may encounter hurdles. Verified Firmware Flashing If LTE bands are missing
The primary reason to flash this firmware: SIM lock removal. Post-flash, the router accepted SIM cards from three different networks (Airtel, Jio, and a regional MVNO) without any unlock code prompt. No need to pay for remote unlocking services.