Can’t make calls on new phone

See these Apple articles below:

Set up cellular service on iPhone

Set up cellular service on iPhone – Apple Support (UK)

If you can't activate your iPhone

If you can't activate your iPhone or iPad (Wi-Fi + Cellular) - Apple Support

Contact your carrier.

See -> If you can't make or receive calls on your iPhone

If you can't make or receive calls on your iPhone - Apple Support

Did you move your SIM card from your old phone? Or, did you activate the new card in this phone?

One of those is required in order for calls to work.

~Lyssa