

Call Waiting works for incoming calls on the same phone number. 4 However, you won't receive a missed-call notification from your secondary number. When you're on a call, an incoming call on your other phone number will go to voicemail if you set up voicemail with your provider. 3 It could also mean Allow Mobile Data Switching is not turned on. If you're on a call and your other line shows No Service, either your provider doesn't support Wi-Fi calling or you don't have Wi-Fi calling turned on.

Check with your network provider for Wi-Fi calling availability and find out whether additional fees or data usage applies from your data provider. If you ignore the call and have voicemail set up with your network provider, you'll receive a missed-call notification and the call will go to voicemail. When you're on a call using a line that isn't your designated line for mobile data, you need to turn on Allow Mobile Data Switching to receive calls from your other line. When you're on a call, if the network provider for your other phone number supports Wi-Fi calling, you can answer incoming calls on your other number. You can make and receive phone calls with either phone number.
