This is an issue with Windows Phone 8.1 Developer Preview. I used the Nokia Recovery Tool to flash my phone back to Windows Phone 8.0. Nokia actually includes the latest firmware update put out by Verizon with the red boot splash screen. My WiFi signal did include the new little "arrow" that points on BOTH the LTE and WiFi signals. Everything worked perfectly. Wifi worked, LTE worked, no lag with power button, smooth as butter. I then again re-upgraded to Windows Phone 8.1 and the Wifi issue is still occurring. The Wifi signal is grayed out. The WiFi cut out on me twice while downloading app updates and the lag to wake the phone has returned. Microsoft needs to investigate these issues and get them fixed as soon as possible or they are going to have to delay the official release of the update. This will definitely cause them to lose sales, especially with Apple soon to release the iPhone 6. Come on MS, get on this issue NOW!