In what seems like a game of self one-upmanship, UBS' Maynard Um has raised his own estimate of the number of iPhones Apple will sell in the 4th quarter to 30 million units instead of 28 million, reacting to an earlier report today at a UBS conference that AT&T is on track to handily beat its best-ever iPhone quarter of 6.1 million units, having already sold 6M in the first two months of the quarter.
