What a story... I can't believe you got a manager!  I have a Blackberry that is only capable of 2G due to overcrowding with 3Gplus where I live in Los Angeles.  This has been an ongoing problem for 1 year 4 months.  AT&T recently pushed out an update for the Blackberry and the update took away the users ability to select 2G. So now the devices (there are 2 of us with Blackberries) just sit here unable to connect. I pay them for 2 unlimited data plans and have no data connection during the day - yet I still have never been allowed to speak to a manager.  So kudos to you for getting that done!

I was reading this article today and thought I would share it...

http://www.wpcentral.com/long-queues-china-second-batch-lumia-920-yellow-variant-sold-out

I hope everybody who wants Yellow eventually gets Yellow.  I posted a link in an above post with contact info for Nokia if you would like to tell them your disappointment in an obvious lack of stock.  I don't know if they will respond any better than AT&T - but at least you know you were able to say/write your frustration.