@Jdays

It sounds like you may have not set the connectivity type to DynamicIP when you were first setting up the router. There is an option in the network settings to change the type of connection; however, I would just recommend factory resetting the router and selecting the option when first starting the configuration process. Try resetting back to default and see if the issue persists. Also, try to confirm that you have the most up to date firmware for your router.

  @Jdays, 

I would thenn place my money on the modems DHCP server not operating correctly. Try unplugging the modem and leaving it for 10 minutes before plugging it back in, this is often enough time to cause the modem to get new settings from your ISP, then try to connect the router and see if it gets an IP.

For some routers, under IPv4 there is a new option to get IP using UniCast, try looking for other settings that are similar or related to WAN IP addresses.