Hi, I have a Lumia 640 from metropcs running wp8.1 update 2 out of the box. Suddenly, the default camera app, along with the Lumia camera app and selfie app and all others doesn't let me use the front camera. Whenever I switch from the main camera to the front it's just black and shows nothing. Tried numerous soft resets and even a couple hard resets and using the Lumia software recovery tool with no luck. I'm stuck with what to do. Main camera works perfect. Any advice anyone?
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