Three Steps to make cellular router work?
1. Get a sim card with data business, enough balance available; Insert the sim card into cellular router sim card slot.
2. Cellular signal is good enough because good signal is required for dialup and good internet speed and bandwidth;
3. One PC or Laptop with RJ45 port to config the router. If H685m is with wifi option feature, you can also config it via WiFi.
For details, please refer to the manual.