We’ve already talked about how iOS 6.1.3 fails to fully secure the iPhone from attacks against its lock screen, but when it comes to unresolved issues, that’s apparently just the tip of the iceberg. Users have reported a slew of additional problems which iOS 6.1.3 either introduces, or fails to properly remedy. Earlier iOS 6 releases attempted to fix a bug when connecting to Exchange servers, and while things are a lot better than they used to be, apparently the situation isn’t quite resolved 100%, ...