You can use a router without a modem to transfer files or stream content between devices on a wireless network. However, you need a modem and an Internet Service Provider (ISP) to access the Internet.
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Can a wireless router be used without a modem?
You do not necessarily need a modem or an Internet connection to communicate with other devices on a local area network (LAN). As long as you are connected to a router's wireless network, you can send data to printers, external devices, and other devices.
The main difference between a modem and a router is that the modem provides an internet signal. However, the router sends a Wi-Fi signal so that your devices can communicate wirelessly with the modem (and with each other). A modem is needed to communicate with devices outside your network via the Internet.
The steps for setting up a Wi-Fi router with or without a modem are basically the same:
