iPhone What does the symbol mean? Phone with squares under?

[AzGuy623]

The phone is not jailbroken. What does the symbol mean with the phone and squares under it? Thank you in advance

 

[Tyler23]

The phone is not jailbroken. What does the symbol mean with the phone and squares under it? Thank you in advance

"This icon means that iPhone is able to use a TTY device. This function is off by default, and if you want to turn it off or on, go to Settings > Phone > TTY."

 

[AzGuy623]

What does that do? It is on my wife's phone which is very strange. Is it a messaging app aside from text or SMS?

 

[Tyler23]

What does that do? It is on my wife's phone which is very strange. Is it a messaging app aside from text or SMS?

I suggest you read this page:

http://support.apple.com/kb/HT3519?viewlocale=en_US&locale=en_US

And, for future reference, no third party app can add any symbol to the status bar.