Right now I am running 3.5 on my D3, but I want to upgrade to 4.0 since the camera app keeps crashing and it doesn't seem to save my screen brightness setting. The one thing that's holding me back is I'm using it on TMO after flashing the radio to the Chinese version of the Milestone 3. Will the upgrade force it back on Verizon? I used a version of the ROM with the Chinese radio already baked in. If I upgrade, what will I need to do to get it back on T-Mobile?