Lock phone call

[Redx]

I just spoke with an employee from a Verizon store and they told me there is an app to lock my phone while I am on a call so that my phone doesn't hang up and end the call. I asked what the name of this app was and he didn't know. Has anyone used or heard of this app? If so, could you please tell me what the app is called. Thank you.

 

[rootbrain]

My Rezound has a proximity sensor and does pretty much the same thing. Don't need and app to do it.