I need a help here. My friend accidentally upgraded her iPhone 3GS OS into 6.0.1. The problem with the update is she is using an unlocked US iPhone. I created custom Firmware with Snowbreeze 2.9.7 (Simple mode with activation option). It seemed to work during the update since it showed snowbreeze logo during the firmware upgrade. However, after the snowbreeze upgrade, I could not even get over the activation windows. I always get the Server busy message and on my itunes it says "No SIMcard installed and please insert simcard".
Do you guys have a solution for this?