Update on the update: after having the issue become very intermittent, I had the CPU reballed. And it appears to have resolved the issue. The phone has been running under a stress test for over 100 hours. Without losing the screen or going off

Luckily I found a repair shop that was willing to reball it, everyone I talked to said it's not worth trying to fix, it's unlikely to work. This shop just shrugged their shoulders and said it's not going to work, but for 50 bucks we'll do it anyway. So I rolled the dice and I won

.....

That being said, I'm not going to trust this device, as a daily driver. But I think it's proven itself well enough to be a backup.

......

I went to the cell phone mall, you know the type, 500 little booths all selling the same things over and over again. Most of the booths with people sitting around idly not doing anything. I walked around the very dark back part of this area, until I found a shop that had equipment I could recognize, anti-static mats, microscopes, a reflow workstation, dental picks, actual SMT soldering equipment, a wave solder station, would you even believe a vent hood?... And everybody in this shop was doing work. So I figured, this was the right group of people to actually get the CPU reballed. And they were quite helpful. Apparently they're the actual engineering shop that everyone else uses. It's good to go directly to the source.