Wi-Fi Calling
Calls work anywhere with Wi-Fi.
Why use it
Bad cell signal in your house? Wi-Fi calling fixes that. Free.
iPhone setup
Settings → Cellular → Wi-Fi Calling → On.
Android setup
Settings → Connections → Wi-Fi Calling → On.
Travel use
Use in foreign hotels with free Wi-Fi. Free calls home.
Same number
Same as your regular phone number. People call you normally.
All major carriers support it
Verizon, AT&T, T-Mobile, Consumer Cellular. Free service.
Quick Tip: Set address in carrier app for 911 routing — emergency services find you faster.