Will the Z10′s success shield BlackBerry from subscriber drama?

Will the Z10′s success shield BlackBerry from subscriber drama?:
BlackBerry's (BBRY) share price is soared on Monday afternoon, goosed by new brokerage comments on early BlackBerry Z10 sales in the United Kingdom. It's possible that a short squeeze may be developing after last week's share price decline. The problem with estimating handset sales volumes, of course, is that it is usually impossible. And with BlackBerry, there is the added complication of trying to evaluate changes in the subscriber base. The most tangible recent example of problems with phone volume estimates was Apple's (AAPL) recent Christmas quarter. The very same Jefferies analyst that is now making pronouncements about BlackBerry Z10 demand wrote last month that the iPhone volume for the Christmas quarter would be 53 million units. Apple ended up selling 47.9 million iPhones in the holiday quarter and that 5.1 million unit miss had huge implications for Apple's share price.

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