3gs won't focus in low light conditions

Unless I am in 100% daylight my camera won't focus where I tap. In fact only macro shots will focus.
Sometimes I see the camera focus when switching between video and camera mode but only briefly and then it goes back to macro mode. On occasion restarting the phone a few times will fix it but it mostly won't focus.
Is this just my phone or do other people have this issue?

Not sure how the iPhone camera does it's autofocus..many cameras use an infrared ranger. If the infra red led emmitter is sheilded it can't function and thus no auto focus. If this is how the iPhone camera works, have you sheilded any infra red sensors, badly fitting case, bad screen protector ?
Message was edited by: Denis247

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