Hi, I bought a used Iphone 3GS and it's Jailbroken. There was some existing music on there- and the only app was Cydia. Now I registered it to myself, and entered my Apple Store (itunes) account info on it. I bought several Apps through iTunes on the phone. HOWEVER... It will not sync with iTunes on my computer and it threatens to delete all apps on the phone. I cannot "Manually Manage Music" either, it won't let me without deleting stuff. I want to be able to add music to the Phone and be able to Sync new apps on my computer. What are my options? Has anyone done this? Please help.