New photos published by Sina Technology show a WCDMA version of the iPhone 3GS ready for use on China Unicom’s network. The pictures show the phone connected to Unicom’s 3G network, and appear to confirm that the device lacks Wi-Fi, as its menu option is notably missing from the Settings application. iPhone in China reports that the phone displays a message on boot up that, roughly translated, says “Dear user, you are welcome to…