Connectivity

How Wi-Fi Calling Works When Cellular Signal Is Weak

A phone can have excellent Wi-Fi while showing only one bar of cellular signal. In that situation, Wi-Fi calling can allow ordinary calls and, in many cases, text messaging to keep working through the internet connection instead of relying entirely on a nearby cellular radio signal. The feature can be especially useful inside buildings where walls weaken cellular coverage but a home or office Wi-Fi network remains strong. It can feel similar to making a normal mobile call because the phone still uses its standard dialler and phone number.