Well my random-reboot-phone was a prototype RM-985, Microsoft replaced it with the NAM RM-985 variant. Its currently running the NAM firmware, no reboots, no freezes. Not sure whether the prototype was faulty or the NAM ROM is stable.
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.
Lumia recovery tool, removing SD card, changing connection settings, etc.. All these solutions don't help, so should we call Microsoft? All at once through twitter or mail.
My teacher got 830 recommended by me, and now he is kicking my *** -here in Saudi Arabia people hates Nokia, bad luck for me!!-.
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.