It's really good to see that the issue which we all were facing about VPN setting getting crashed has been finally rectified by Sony. You have to only update your phone to the latest available build version which has been just released few weeks ago.
Even the other problem related to setting which allows you to swipe, pin, password lock your lock screen has been solved. The swipe option is no more faded like before hence you can switch between pattern lock and swipe and back without any problems.
So far Sony has not stopped it's support for us. But please give us Android 4.4.4. We still have other bugs like volume automatically getting lower or higher without our knowledge. That's really bad.