You can use Wi-Fi calling on your Android or iPhone to make calls using Wi-Fi rather than your cellular network.

Alternatively, if almost every unknown caller is a dud, you can safely pick the “Silence” option and let voicemail sort them out. This is especially true in an age where number spoofing is rife, where ...

You can place a conference call on your iPhone from the Phone app, and then add up to five total participants.