: Particular base versions of stock firmware are required if you intend to remove carrier SIM restrictions. Step-by-Step UTel L443 Firmware Installation Guide
Before starting, ensure you have the following information and hardware: : Typically 192.168.1.1 or 192.168.0.1 .
Disconnect the cable. Press and hold the power button on the L443. The first boot after a firmware update may take 5–10 minutes (this is normal as it rebuilds caches).