iOS 8.3 Fixes iOS 8.2 WiFi Problems
Consumers complaining about iOS 8 WiFi problems and iOS 8.2 WiFi problems may find some relief from this update. Apple specifically mentions fixes for WiFi problems.
Time will tell if this can actually fix what some call the Wifried iOS 8 bug. Apple says the iOS 8.3 update, "Addresses an issue where some devices disconnect intermittently from Wi-Fi networks."
This will also fix Bluetooth problems and an issue where the iPhone continuously asks for login information.