Finally got my computer to recognize my phone for pc studio and tk. Uninstall all previous Samsung stuff in your Program's and Features in Control Panel (usb drivers and pc studio)
Redownload the PC Studio and USB driver from the samsung website
http://www.samsung.com/us/support/downloads/t-mobile/SGH-T919CNATMBIf using Windows 7, right click the setup file for PC Studio, click properties, compatibility tab, run in compatibility mode for windows vista sp2, click ok. Do the same for the setup.exe in the MCCI WHQL usb folder. Install PC Studio, run the updates. Install the mcci whql usb driver, restart, connect your phone and click pc studio, and you should be done. Worked for me at least.
