How to uninstall Facebook messenger app from iPhone?

I was on my dads girlfriend phone and I accidentally turned the instant messenger on so now even when I'm logged out it shows her my messages.

Wait. Do you mean… Like. She already had the messanger app on her phone? Because if she didn't than you could just hold it till it starts shaking and then click the "X" on the top corner of the app. But if she already has it on her phone. I have no idea… The only advice i would give is delete it from the iphone.(how i told you in my previous sentence) and than install it again from the app store. If that doesn't work, than i have no idea:/

Hold down on the app and press the "X: in the top right corner of the app… Your welcome, please vote me best answer.

@ Cortnee, best answer ever, thanks!

That's great but how do you get rid of the prompt to install it>

Deleting the ICON off your iPhone DOESN't uninstall it, guys. It is still downloaded and using up memory. I want to REMOVE it completely. Wish someone who actually knows what to do will post a real answer.

Can I use iPhone 5c from Sprint ( it does have sim and sim slot) on AT&T network?

Best Answer? Cortnee!

I can't get the infinity slots off my messenger and also a friend text me and she keeps getting it on her I phone from a previous text. I NEVER DOWNLOADED THIS.