lg g vista

After booting has finished, the screen goes completely black with the dialog box "Unfortunately, system ui has stopped working." It still charges and the light still works. I can turn on and off the screen. I've tried wiping the cache, factory reset, and safe mode from the system recovery...

I know this must sound weird. The LG G Vista is a cheaper phone but it has a couple default features that are nicer than those on the LG V10. Specifically, I like the default clock and the little floating icon that appears during a call so that you can return to the call quickly. How can I get...