My iPhone 6 Plus camera is not working

My back iPhone 6 Plus camera has randomly stopped working. I have soft reset my phone, hard reset my phone and done the usual switch on and off but nothing! Completely black, no flash will work etc. The front (selfie) camera works fine but when I switch it back to the other camera nothing

What happened to the iPhone SE on Cricket Wireless?

I was planning on buying an iPhone SE on Cricket Wireless, which was available when I was looking a month ago. I went to buy it today, and it no longer appears to be an option. Anyone know what happened and if it's coming back?

Newsfeed part on my Facebook iPhone app is not loading and says 'no stories to show' but everything else is working?

The newsfeed bit on Facebook isn't working and just comes up with a sign saying 'no stories to show' but everything else on the Facebook app is working fine. I've tried logging out and back in and I've also deleted the app and reinstalled it. My home Wi-Fi is working and everything else is working fine on my phone but I can't try to use without Wi-Fi as I have no data - incase it has anything to do with that.
How do I get it working again?