This one is for the 8520 owners out there. Carrier BASE has released the latest official OS for the 8520, although without a change log kind of hard to say what has changed within this release. I was able to download and upgrade my 8520 with no issues. Personally, I'd rather see a 5.0 leak but I'm sure that will come with time, besides the 8520 has a rock solid OS as it is.