Metropolitan Police Commissioner Sir Mark Rowley has thrown down the gauntlet to the phone industry to take action over stolen devices by June 1 or face being forced to do so by law.He said that the Met will call on the Home Secretary to change laws to force phone companies to take action if necessary, and will encourage international law enforcement to do the same.Sir Mark told delegates at the International Mobile Phone Crime Conference in central London that he does not understand why the telecoms giants have not done more.