What's The AT&T app that allows you to sign on wifi and use voice cams/boost signal

I remember knowing it sometimes last week, but I've since forgot what it's called

K
(Example:)
Say you're in the office and something fierce hits your and you head to the bathroom and swipe up your phone and unplug it from the charger before heading out. With your power walk/clench combo, you hit the John fairly quick..... Now you are posted up on the commode trying to evacuate and pinch off the equivalent of a 12' debris on Leidenheimers loaf... and the phone you scooped up is showing zero bars (no service in your exact location), that is when you can tie your at&t network into the wireless wifi and try and call up Mrs Linda and see if UberEATS can pick you up a half gallon of Ya-ka-mein and have it delivered to the office on this lovely Tuesday, curbing that Monday Finn's trivia night



Tia