I have an icon on the top of my phone. Looks like a little telephone, what is it?

[iMore Question]

i have an icon on the top of my phone . looks like a little telephone what is it

don't know where it came from

 

[kch50428]

Re: i have an icon on the top of my phone . looks like a little telephone what is it

http://help.apple.com/iphone/9/#/iph3bd00c84

Likely the TTY setting was activated...

 

[Larry Cook1]

Re: i have an icon on the top of my phone . looks like a little telephone what is it

Go to settings, phone, and toggle tty off.