Iphones will not connect to 2g network, only 5g

I’m assuming you mean a 2.4 GHz Wi-Fi network vs a 5 GHz Wi-Fi network. The iPhone 6 should support both, so the problem is most likely in your router or router settings. For example, the IP address range may not have enough unused IP addresses. As a first step try restarting your router. Then go over the settings carefully in the router’s control center.

As another possibility, do your 2.4 and 5 GHz networks have different SSIDs? If they don’t you can’t control which band the phones will connect to. They will always choose 5 GHz.

chuck1p wrote:

Both my Iphone6 and my wife's Iphone6 will only connect to our 5g network even though we have many devices in the house connected to our 2g network. I can't install a smart device using the 5g network, only 2g.

Is that an issue? Most any dual-band Wi-Fi router permits communications between 2.4 GHz and 5 GHz Wi-Fi clients.

It may also be an interference problem. Try changing bands in the router. Most routers will default to band 6 or 11, so choosing a different band may help. Also, as my fellow user-volunteer has pointed out, as long as they are sharing the same router devices that are limited to 2.4 GHz should still be able to communicate with a device connected to the 5 GHz bands.