Huawei B311-221
Finding a "patched" firmware for the (a popular 4G LTE router) usually refers to software modified to remove network locks , enable VoIP/CS Voice features, or allow custom DNS and TTL settings.
provide updated links to firmware repositories and installation guides. Scribd/PDF Repositories
provide standard features such as LTE support (up to 150Mbps), Wi-Fi (300Mbps), and standard security protocols. Patched Firmware
This method is risky but often the only way if the web upgrade is blocked.
