After installing update 614, my wifi would no longer turn on. I rebooted, wiped the caches and did a factory reset. Everything was fine until I rebooted...loosing the WiFi again. I repeated the steps 3 times thinking it may have been one of my updates from Google Play that was causing the problem. I ended up restoring a backup without the update. I'm back to 611. My wifi and data are fine. I would like to continue with my nightly updates. Does anyone know a fix for this wifi issue?