I was waiting and waiting for my Mango update, I even contacted Sprint. Unfortunately Sprint is not set up for effective customer support, this is the topic for another post (Will Sprint support their new Apple customers effectively?). I called twice, visited my local Sprint store numerous times, until I got to the root of the issue, "they" were releasing the updates in batches, the Sprint store alluded to Sprint as the culprit, but according to the Internet it's Microsoft that is releasing the updates. Microsoft has a very valid reason for holding off on the release, "Quality", they need to make sure the updates are going well before releasing them to all (and potentially having a deluge of problems to deal with).
I saw references to forcing the Mango update on the Internet, and tried one way which did not work. Switching the update settings on the phone on and off multiple times, did not work for me. I then found a YouTube video explaining another way, which did work. The instructions are here: http://youtu.be/bO0ZnoKXyqY and I found the link in this conversation: http://windowsteamblog.com/windows_phone/b/windowsphone/archive/2011/10/03/windows-phone-7-5-update-status.aspx
The update took a while and seemed to be hung on the last Phone restart, I ended up powering it down, and powering it back up, even though my PC screen said not to. :-)
It's working now, and I am happy.
The Sprint lesson I learned is to ask detailed questions to the techs and to ask them if they are an expert on my phone, I had one admit to me he was an Android Tech and was told by management not to pass off windows calls to Windows Techs but to try and fix it on his own.
