What is the meaning of this icon?

[Benaya Matius]

My phone suddenly turn off and locked. I open it again then i Saw a logo on top right of my phone, the logo / icon is a square with red color inside and has WiFi symbol, like screencast icon but reversed with red color inside the square, does my phone hacked? What's the meaning of the symbol? Please help me.

 

[Javier P]

Welcome to the forums. Could you post a screenshot with that icon? Sometimes that kind of red boxes are related to Switch Access shortcuts. Just in case, go to the Accessibility settings and make sure that Switch Access is disabled.

 

[B. Diddy]

Welcome to Android Central! Also, which phone do you have?