TAIPEI (Reuters) -The shares of several major Apple suppliers fell on Friday, following reports that China had widened curbs on use of iPhones by state employees, fanning fears about sales prospects in one of the U.S. company's biggest markets. Staff in at least three Chinese ministries and government bodies were told not to use iPhones at work, sources familiar with the matter told Reuters. Shares of ASE Technology Holding Co Ltd, one of the world's largest semiconductor testing and packaging firms, fell more than 2%, while camera lens-maker Largan Precision Co Ltd dropped more than 3%.