The strength of your cellular service will vary depending on your carrier and device.
Using Wi-Fi calling to remedy Poor Cell Service
Wi-Fi calling, or Voice over Wi-Fi (VoWiFi), lets you make voice calls using a Wi-Fi network rather than your carrier’s network. It's very helpful in locations that have Wi-Fi available but not good cellular coverage.
Many students are already familiar with Skype, FaceTime and Facebook Messenger which let you make “calls” over a Wi-Fi network. True Wi-Fi calling is a bit different in that it’s native to the phone. In other words, there’s no need to open a third-party app — the phone automatically switches to Wi-Fi for voice calling if/when cell service drops.
WiFi calling is currently supported by T-Mobile, Sprint, AT&T and Verizon. Click the links below for more specific Wi-Fi calling support information for your carrier: