You can get Mark the Spot from the iTunes Store for free. Here’s a link to save you time. And here’s a picture of the app’s opening screen.
They haven’t thought of everything, but they do realize that if you’re having technical issues with AT&T’s services it’s quite likely that sending them a note right then isn’t going to be possible. They handle that by dropping a little pin onto a map, marking the spot (get it?) and when you finally get service again the note and the map and the pin get sent. That’s kind of a clever way to do it.
Complaining about AT&T’s service seems to be the “in” thing these days but it’s a lot more fun when you complain to the right people, and with Mark the Spot it’s really convenient. If you’re having issues with AT&T’s service this is the app for you.