So, this thread tells me that jailbreaking iOS 4.0 on my device (<) will only be possible if I have 3.1.2 blobs saved (witch I haven't) or if 3.1.2 was preinstalled. I hope I understood right, and that preinstalled means that that version was on my device when I bought it. If I understood it right indeed: is there any way to check my preinstalled version? I think it's 3.1.2 but I'm not sure. Please someone help me out of my misery and answer my question. Thanks in advance for your response.