I had successfully updated to 4.2.1 with the iPad baseband. But then the SAM's fix came along, and I deactivated my phone before installing the patch. Tried restoring to the Custom firmware I cooked in Pwnage following Dev Team's instructions, it didn't work.

So I restored to 4.1 instead with my saved BLOB's. Now I am running iOS 4.1 on iPhone 3G with the 6.15 baseband. How can i update to 4.2.1 without bricking my phone.

Thanks in advance.