Ask Engadget: best smartphone for a teenager?

We know you've got questions, and if you're brave enough to ask the world for answers, then here's the outlet to do so. This week's Ask Engadget inquiry is from Gingernut2K, who wants to talk about responsible parenting and not being too much of a snooper. If you're looking to ask one of your own, drop us a line at ask [at] engadget [dawt] com. "I've always felt that talking to your kids and trusting them to be responsible is much better than trying to seal them in cotton wool. The problem? My d...