how do I make a wifi call
How do I make a wifi call from iPhone 12 pro
Question marked as
If your carrier has this feature then get it enabled for your SIM plan. Contact them, please.
SMS, MMS, WiFi Call, Call Forwarding, Call Waiting, Call Merge, Conference Call, Hotspot, VoiceMail (Visual or Normal) all are Carrier Specific features. Contact your Carrier (Cellular Service Provider), the agency that issued the SIM / eSIM to you.