You can relay phone calls and text messages through your iPhone to your iPad or Mac, so it’s easy to stay in touch no matter what device you’re on.
Use your iPhone to make and receive phone calls or messages on your iPad, Mac, or another iPhone.
Note: Cellular charges may apply. Wi-Fi Calling isn’t available from all carriers.
Make sure of the following:
Both devices have Get started with FaceTime on iPad, and > Apps > FaceTime on your iPhone.
Turn off Allow Calls on Other Devices.
If you no longer want to receive phone calls on your Mac, you can turn off Calls from iPhone.
Go to the FaceTime app Set up iMessage on iPad. To send and receive iMessages on Mac, see Move a FaceTime call to another device for Mac.
For more information about Wi-Fi calls, see the Apple Support article Make a call with Wi-Fi Calling.