What is this icon with a phone in a box with lines?

[Android Central Question]

My phone died, I turned it back on then there's this icon in my status bar. It wouldn't go away, I tried airplane mode even reset network settings and made a call. I booted into safe mode. I don't know what it is. I have a screen shot too

 

[methodman89]

My phone died, I turned it back on then there's this icon in my status bar. It wouldn't go away, I tried airplane mode even reset network settings and made a call. I booted into safe mode. I don't know what it is. I have a screen shot too

Posting the screenshot would be a good idea.