Mobile phone Web surfers from several service providers discovered last March that their wireless Web services were distributing their phone numbers to Web sites without telling them. The disclosure enraged privacy advocates and prompted at least one company--Sprint PCS--to promise quick . . .
Mobile phone Web surfers from several service providers discovered last March that their wireless Web services were distributing their phone numbers to Web sites without telling them. The disclosure enraged privacy advocates and prompted at least one company--Sprint PCS--to promise quick changes.

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