1 million
It has over 498750565 members worldwide
near about 189millon
over 180 Million worldwide have their credit card details locked into an itunes account, as for the exact amount of users its hard to calculate
About 1.7% of iPhone users are switching to ANY other phone as of September 2011. In a survey, 47% of Android users plan on switching if the iPhone gets a redesign soon enough.
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No accurate figure can be given, though there are many millions.
Yahoo! Answers staff claim 200 million users worldwide and 15 million users visiting daily.
1.73 billion - Internet users worldwide (September 2009)'
Apple Computer iPhone users are dedicated smartphone users. Many fans keep their older versions after the purchase of the latest version. These users sometimes even specialize the uses of their smartphones. E.G. one iPhone for work and another for personal business. There is nothing wrong with this practice. It is the users who buy the latest iPhone then place the earlier versions in the back of a desk drawer or filing cabinet that lose money on these phones. Smartphones depreciate quickly just as computers do. People should check their iPhone inventory with every upgrade and sell unused ones.
February 2010 - Myspace.com reached the magical 150.000.000 users/accounts.
There are some different answer for the question how many users Habbo have in the United Kingdom. However, most of people agree that Habbo has around 1 million users worldwide, but around 60% are inactive for over 12 months.
Neil Gaiman's books have collectively sold over 10 million copies worldwide.