Regular Wi-Fi routers don't require a SIM card because they don't have built-in cellular modems. On the other hand, mobile routers are router/modem combos and require a SIM card for cellular internet. However, you can use most mobile routers to set up a LAN without inserting a SIM card. TP-Link N150 4G router is of the cheapest options out there. Unlike other routers, this one doesn't have its own SIM slot. It uses a USB port where you can plug in a dongle with your SIM card. Though, it increases the overall cost, but still the package is quite affordable. The best thing about TP-Link N150 is portability. To connect a SIM card to a WiFi router, follow these general steps: Check the router's user manual or manufacturer's website for specific instructions on how to insert the SIM card. Turn off the router before inserting the SIM card. Identify the SIM card slot on the router. It is usually located on Scenario 1: Install a SIM card for a 4G Wi-Fi router. Find the SIM card slot on the back panel. Get a SIM card (Micro or Nano) that fits the slot. For a Micro SIM card slot: Tip: With the provided SIM card adapter and sticker, you can convert a Nano SIM card to fit a Micro slot. For a Nano SIM card slot: Note: Only a Nano SIM card can fit a Simply install a SIM card in the router and you can connect wirelessly, which is the most economical way. For general Internet access, few devices, or monitoring network use only, it is recommended to choose a 4G LTE network card router to connect to the wireless network to save the cost of installing a physical wired network. Here's everything about using your phone SIM card in a mobile router: For the most part, yes. The SIM cards used in phones and mobile routers are physically and functionally identical. The mobile router will be able to read the SIM card just fine and use it, but that doesn't mean that your phone plan is well-suited for mobile router The short answer is yes, you can use a 5G SIM card in a 4G router. However, there are certain factors that determine whether or not they will be compatible with each other. Read also How Can I Get Better Wi-fi In Rural Areas? This is how smartphones and other devices get internet service without needing WiFi. Cellular routers allow multiple devices in a WiFi network to access the internet by connecting to cell towers instead of underground cables. This allows easy internet access on-the-go or in areas without accessible or reliable WiFi. 5611Hh.