: Reliable firmware can maintain connections at RSSI levels as low as -110 dBm, where budget routers often fail.
: High-quality firmware allows the modem to switch intelligently between bands (e.g., from Band 3 to Band 20) within seconds to avoid interference and maintain 4G+ speeds. huawei b612233 firmware high quality
Huawei B612s TD-LTE Modem Router – обсуждение - 4PDA : Reliable firmware can maintain connections at RSSI