A: It increases the efficiency of your router, which can lower latency (ping) and fix packet loss. It will not increase the speed your ISP sends you (e.g., 100 Mbps to 200 Mbps), but it will help you actually achieve the speed you pay for.
Locate the manual upload section. Click the or Choose File button. Select the firmware file you downloaded in Step 1. Step 4: Execute the Upgrade Update Zte Router Firmware