Thanks for the idea about the plastic still on the lens, but I made triple sure it was gone. The lens feels very secure. I use this in my car as my stereo and I notice a lot of "skipping" while playing songs that doesn't happen on my T710 while using the same player, GoneMad Music Player, and the same version of the player. And I notice that videos that play fine on the T710 while using MX Player also suffer from lots of "skipping" as the audio goes more and more out of sync. At this point I have to assume that either I got a bad one, or the T713 just isn't as good as the T710. I've been putting it off, but it's definitely going back while there's still time.