Starbucks Coffee Co. said Thursday it has now implemented advance orders through smartphones at more than 7,400 of its locations in the United States, and it will start trying the idea in Canada next month. The coffee-chain operation said in a press release that users of Apple Inc.'s iPhone or devices running on Google Inc.'s Android operating system can now use the Starbucks app to place orders and pay for them remotely in advance of picking them up at locations across the U.S. It said it tests in the U.S. that started in December have been successful, and certain locations in...