How to make VoIP and Wi-Fi calls through your Android phone You might think of your mobile service as the best way to place a call, and usually, you’d be right. However, sometimes you may find yourself in an area with solid Wi-Fi but no cellular coverage. All hope is not lost because we’re here to show you how to make VoIP and Wi-Fi calls on an Android device. What is a VoIP or Wi-Fi call? Credit: Edgar Cervantes / Android Authority Internet-based calls are just like normal calls in that you can speak to and hear someone over the phone. However, they ditch your carrier’s network of towers in favor of the internet. In fact, VoIP (Voice over Internet Protocol) calls used to be a go-to way to get around the monthly talk limits of your phone plan.