What is Wi-Fi?

Wi-Fi is a technology that connects computers, phones, and other wireless devices to the Internet and to each other using a radio frequency. To use Wi-Fi, your device usually needs to be close to a modem with Internet service and a wireless router.

Wi-Fi Calling with T-Mobile.

If you’re a T-Mobile customer, you can use your phone to make calls and texts anywhere there’s Wi-Fi just by connecting your phone to a Wi-Fi network. No additional apps are required, and it’s included in your plan.