We know you've got questions, and if you're brave enough to ask the world for answers, here's the outlet to do so. This week's Ask Engadget inquiry is from is from Is from Joe, who has helped inspire a regular feature and also wants to know which carrier he should pick for Philadelphia. If you're looking to send in an inquiry of your own, drop us a line at ask [at] engadget [dawt] com. "Hey! I loved your question about NYC carriers and thought it would be a great idea to let your visitors sound off on other major cities. I'd love to hear opinions on Philadelphia carriers myself, so if you could possibly consider adding th
