Cause sprint probably got paid money by the makers of bejeweled to not remove it.. most companies do this..I don't mind that it's there but I do mind that I can't take it off without doing risky hacks on the phone. Why make it so complicated to get the dam thing off? Anything that's a demo should have a "remove this demo" feature in the settings.
Its like the ultimate advertisement space.. hell it is like a billboard that YOU ACTUALLY have to pay for..
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