: Power off the router and insert a SIM card from a different carrier.
Give you a step-by-step guide on how to your router. Let me know how you'd like to proceed ! Huawei B311-221 Firmware Release Notes | PDF - Scribd B311-221 Unlock Firmware
If your firmware is too new, you may need to use to replace the firmware with a patched version (like B311-221-10.0.1.1 or similar). Requirements for Firmware Flashing: : Power off the router and insert a
On stock Three UK firmware, my B311-221 connected to Band 3 (1800MHz) with mediocre SINR. After unlocking and band-locking to Band 20 + Band 1 aggregation? Speeds jumped from 18 Mbps to 52 Mbps down, with latency dropping from 48ms to 32ms. That’s the difference between buffering YouTube and streaming 4K. Huawei B311-221 Firmware Release Notes | PDF -
Search reputable router forums and firmware repositories for “B311‑221 unlocked firmware” or “B311‑221 open line firmware”. Be extremely cautious about where you download from – malicious files are common. Look for files that are:
Travel internationally and slip in a local prepaid SIM card to avoid expensive roaming bills.