First. I have searched for this info. I have been a member for a while and usually find my answer to my questions...But I am stumped here. I know it said it can't be done. But I saved both files. I downloaded first leak 2.1a and install successfully and had no probs. But then that "verizon employee" who said he had the official leak 2.1b I downloaded and installed successfully. I was getting mad at my phone for the no speaker or microphone everyday this was happening. So I pulled back up the 2.1a and put on sd card and installed. Here are the file sizes for the first one 2.1a 108,854,573 bytes. 2.1b 108,819,939 bytes. my kernal version for 2.1a is: 2.6.29-5cf233c htc-kernel@and18-2 #1. Can someone confirm that kernel for 2.1a or prove me wrong showing me that the 2.1b kernel is the same. I forgot to look at the 2.1b kernel. This is why I am asking. I'm hoping I actually downgraded...But I am not sure.