I have 2 unlocked iphones both done on ITunes 7.3 and upgraded to 7.3.2, if I ever have to restore I know it works because I tried it after the unlock but if I were to upgrade to the latest version 7.4.2 I believe will I run into any trouble if I needed to restore or should I not even bother upgraded and keep what I got sense it works, dumb question but curious what versions people are running right now