I really want to use iOS 6.1 beta on my phone but I'm worried about giving my UDID out to one of those third party sites. What kind of info does the UDID give in this case specifically, and is it safe? I did it on my 4s and I didn't have any problems, that I could detect anyway. I've googled this but haven't really found any conclusive information. Is it safe for me to registers UDID for the beta on a third party site?