Start with a better network check.
A single speed reading is one piece of the picture. Compare connections and conditions before deciding what to replace.
Ethernet vs. Wi-Fi
Compare readings from the same device and speed-test service, taken close together. Connect by Ethernet first, then test Wi-Fi in the room you want to check. Pause other downloads during both tests.
Enter readings from your preferred speed test. This comparison runs in your browser; it does not measure your connection or save your readings.
For weak coverage or intermittent connections, explore Wi-Fi and network installation and wired network cabling.