Apple Inc. has revised its iPhone delivery contracts with Japan's three largest mobile carriers after concerns arose that its restrictions on rate plans violated antitrust regulations, the country's antitrust watchdog said Wednesday.The Japan Fair Trade Commission said it ended its probe into the issue as Apple and its Japanese arm have already agreed on new terms with NTT Docomo Inc., KDDI Corp. and SoftBank Corp.Apple had asked the three companies to subsidize the retail prices of iPhones in the form of discounted rate plans, a stipulation the FTC saw as preventing the carriers from freel…READ FULL ARTICLE