After opening up the camera application, I'm supposed to open the camera lense cover to use the camera. The problem is that that after I open the lense cover, the phone tells me it's not open. I can't take pictures or video at all. What's the problem and how can I fix it?
Have you already tried powering the phone off for a couple of minutes, then back on? Or if that doesn't work, I'd try doing a master reset. If those things don't resolve it or you continue to have the problem, you may want to consider filing for a warranty replacement.
The number for at&t's warranty department is 1-800-801-1101, or you can visit one of their "Device Support Centers" if there is one nearby.
My wife's C905a just started doing this ... it's 2 months past the year warranty. Mine has been fine, both purchased at the same time. Odd thing is she hardly ever uses hers and I'd be at a loss without mine.