Chromecast 4k wont recognize my mobile data

[Natalietm]

I can't set up my Chromecast because the WiFi list doesn't recognize the mobile data from either of our two iPhones. We're able to use our mobile data on all other devices, including iPads, PCs, etc. I have tried everything from turning our phones on/off, chromecast to facric settings and using one phone and one tables. Nothing seems to work. Please help. 

[David_K]

So if I understand correctly, you're following these steps to turn the Wi-Fi hotspot on your iPhone on?

How to set up a Personal Hotspot on your iPhone or iPad – Apple Support

If your Chromecast can see other Wi-Fi networks, just not your Wi-Fi hotspot, it suggests it's not setup quite right on your iPhone. Make sure the "Allow Others to Join" setting is turned on. In my experience, you might need to turn your hotspot off and on again for it to appear as an available Wi-Fi network.