I’ve been having the same issues, very strange. Hopefully they push out a software update soon and fix it, as that’s what it seems like the problem is.

The only issue I’ve had with it is my service seems to be spottier than with my previous phone. I’ll lose coverage for a short time in locations where I’ve normally had full bars. And I think this is mostly with iOS10 but sometimes when I click new notifications, it doesn’t bring me over to the app, very strange.