It’s buying a modern router (WiFi 6 or 6E) and positioning it correctly. No root required.
On very old devices (pre-2016) with permissive drivers, this could increase TX power slightly. On modern devices (Pixel, Samsung, Xiaomi with locked radios), this does nothing —the firmware hard-limits power to legal levels. Worst case: you violate local radio laws. The One Scenario Where a Module Might Help There is one legitimate use case : fixing broken WiFi behavior caused by a bad custom ROM or kernel. wifi speed magisk module
If you enjoy tweaking for the sake of tweaking, go ahead. But if you want real speed, put your phone down and go move your router six inches to the left. That will do more than any Magisk module ever written. It’s buying a modern router (WiFi 6 or