I've only had my Turbo 2 for about a week and since setting it up it has randomly shut down about 3 times a day. There doesn't seem to be any correlations of apps being used or a way to replicate it.
Today it shut down just after plugging in headphones to make a call. It displays the "Motorolla" screen and shuts down, requiring a full restart. After the boot screen it says "Optimizing Apps XXX of XXX."
About an hour after the previous restart I was scrolling Facebook and the phone did a reboot, went straight from Facebook to the Motorolla boy screen and animation.
Should I go in to the store or just return the phone?
Nothing yet. I did run it in safe mode for a while to see if it happened and of course it didn't. Tried uninstalling a few fringe apps that I don't use often and went a day and a half without it happening but this morning it did it again. I have contacted Verizon on Facebook and received a response about trying safe mode first.
SeanCorr - I think I found the solution, at least for me. It appears there may be a memory leak in Microsoft Word/Excel. I did a factory reset and manually installed everything back onto the phone a few apps at a time and after installing the two and running them it started again. I uninstalled them and it hasn't happened since. It may occur with any Microsoft applications. Hope that helps.