Erasing NAND… Writing… Verifying…

If you own a 4G LTE router, you know it is a workhorse. It supports Category 6 LTE (up to 300 Mbps download), has two external antenna ports, and provides stable internet for homes or RVs. However, there is one massive frustration: Carrier Locking .

The Huawei B311s-220 router can be officially unlocked by obtaining a network-specific code from the original service provider, which is entered into the web interface. To maintain device stability and avoid hardware failure, only authorized, verified firmware updates provided over-the-air should be installed.

Flashing a modem carried a danger that felt almost ceremonial. In a quiet corner of the studio, with a mug of tea cooling beside her keyboard, Aria opened the flashing utility. She connected the router to her laptop with a coaxial console cable and felt the satisfying click of proper contact. The utility recognized the device. She selected her saved backup file first — an insurance policy — and then queued the patched firmware.

Prevents VoIP call drops. Go to Advanced → Security → Uncheck "Enable SIP ALG".

: Providing your router's unique IMEI number to a service that generates an official unlock code.