Thank for the info. My phone just randomly rebooted for the 5th time in less than 24 hours. I'm honestly at a complete loss. I didn't install any new apps lately, just updated existing ones, most of which are system or stock apps like extras & info, Glance, and Music.
I'm also running the NAM ROM, as I got this Lumia 830 from the Microsoft Store. Hardware wise, the phone seems pristine... audio sounds clear even at high volumes (unlike 2 past 830s I had) and the display is solid.
I feel like a dope defending Microsoft so much now when it comes to the stability of their mobile OS. I didn't complain about the once-every-two-days to once-a-day reboots and kept recommending the phone. But in hindsight, it's really quite comical that every Lumia 830 I owned has had reboot issues, with this being by far the worst.
I said I was going to give it a week or two for full Denim to arrive to see if things improve. I'm starting to think it may be on the shorter end of that range. I can live with a random reboot every 2 days or so (though even that's unacceptable to many), but 5 (and counting) in the space of 24 hours? Sorry, I work too hard for my money.
P.S. I've gone through and uninstalled any 3rd party apps that I can remember being updated recently (since I didn't install any). Pretty sure it was just YouTube Uploader and Metrotube. I also uninstalled Lumia Camera since that doesn't work anyway without full Denim. I finished that up with turning off some background apps like Music and Skype and doing a soft reset. We'll see what happens, but I doubt it does anything.
I was one of the individuals that recommended the 830 to you. I apologize for doing so. Restarts were once every two days or so on that variant. I really did like everything else about the phone... beautiful hardware, solid camera, feature-packed, etc. None of that matters if the OS/ROM is crippled though. I hope your teacher likes the phone enough and reboots are rare enough that they like your recommendation.