DO NOT OPEN The "WHERE" APP!!

What app are we talking about here lol 

Hrm, you need to read the screens and not just press buttons.

The first screen that come sup is a Cancel/OK that tells you all about how you'll be charged after the first 7 days.  If you hit cancel at that point, you do NOT get charged.  I checked my acount.

And then if you do go ahead and try it, you get go to you account (even over MediaNet as that aforementioned screen describes) and cancel the service before the 7 day trial period is over.

yes just follow the instruction on How to delete locked apps safely and you will be fine

Out of curiosity, does pressing the end-call button count as canceling?
LOL, I couldn't figure out how to press cancel so I just did that (I tried pressing via touch, but nothing happened =P )

Well, I tried to press cancel (e.g. the cancel/okay buttons that pop up first when clicking the by clicking on the touchscreen and nothing happened. I assume the app doesn't work with touch or I pressed it inaccurately. So the next thing I did was press hang-up lol. 

I hit the same thing and hit cancel . I checked with AT & T several times to make sure I was not being charged and it never showed up on my account so I take it I am not being charged .

Thanks for posting this!  I checked and was subscribed to that POC app.  Cancelled it online and requested refund.  Will see how that goes but huge thanks for pointing this out!!!