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…showed last 75 words of 470 total…attempting betting. The cell phones reportedly used in the alleged London scam could have been used to determine the ball's speed if buttons on the phones were pressed when the ball was released and then after one revolution, Packard says. In fact, some cell phones have their own built-in stopwatches. A remote computer, or perhaps even one in the phone, could then solve the equations "very rapidly", says Packard, "because you've done all that homework".