Cellular data issue

Start here, you may need to contact your cell carrier to resolve the issue -

If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support

Hey ,

Reseting network settings just removed your APN settings that are installed from your Mobile carrier.

I suggest to check if you have a VPN configuration or VPN application installed , usually they do get some restrictions setted up on theyre own.Do that and Reset network settings again.