Call Waiting works for incoming calls on the same phone number. 2 However, you won't get a missed-call notification from your secondary number.

If your carrier doesn't support Wi-Fi calling or you don't have Wi-Fi calling turned on, 1 then when you're on a call, an incoming call on your other phone number will go to voicemail, if you have voicemail set up with your carrier. With iOS 13 and later, when you're on a call, if the carrier for your other phone number supports Wi-Fi calling, you can answer incoming calls on your other number. You will need to turn on Allow Cellular Data Switching when you are on a call that isn't your default data line. Or, if you ignore the call and you have voicemail set up with your carrier, you’ll get a missed-call notification and the call will go to voicemail. Check with your carrier for Wi-Fi calling availability, and find out if additional fees or data usage applies from your data provider.

You can make and receive phone calls with either phone number.

For apple instal Duel Princess