So I restored my phone back to zv3 to gain root after taking the zv4 update... and now none of my apps will move to sd card using the native button. It is simply grayed out for all apps, even the apps that it used to be available for before I downgraded. Strange... also the built in menu for Wi-Fi/Bluetooth tethering has disappeared, even after flashing the zv4 stock Rom. Any insight fellows?