It's only the One X that doesn't have a removeable battery - one phone in an entire sea... Not a big issue.
However HTC's quality control is another issue entirely with 3 mates including myself outta 5 having issues with our One X's
Thats another topic entirely though, seems they are going down the path of Apple for quality checking.
Yeah 500,000 is not much though. + how many of them are on 4G at the same time
A mate of mine actually is in dev for Telstra under mobile ops so playing around with this stuff all the time, i'll see if i can get more info from him.
Agree RE: 3G in the CBD, Telstra has been struggling bad for 12 months now.