You don't need a SIM card and cellular service to use most features of today's iPhones and Android phones. Most apps and services run just fine as long as you have access to WiFi, and you can even set ...

Wi-Fi calling routes calls over the internet, which is useful if you have poor mobile service. This article explains how to use Wi-Fi calling on Android and why you might prefer it over traditional ...

Switch this toggle on to start making calls over Wi-Fi, even when you have no phone service This article explains how to use Wi-Fi calling on Android and why you might prefer it over traditional calls ...