When will OS 4.3.1. for blackberry go public?

In Other Words When Will The Blackberry Curve Os 4.3 Version Come Out. And If I Buy The Curve Now How Easy Can I Upgrade It To The 4.3 Version

You can't know when it will come out, but it is unlikely that you will be able to upgrade. New 9000-series devices are coming out soon. If you're waiting for anything, wait for that. If you're going to buy soon, I'd get a Curve 8320 with wifi.